/* =========================================================
   BaQuix — baquix.com
   21_zod 复刻：清爽白底 + 橙色品牌 #F97316 + 现代化卡片 + 简洁导航
   独立编写，未复制其它站 CSS
   ========================================================= */

/* ----------- design tokens ------------ */
:root {
  /* brand */
  --qx-brand: #F97316;
  --qx-brand-soft: #FB923C;
  --qx-brand-darker: #C2410C;
  --qx-brand-tint: #FFF7ED;
  --qx-brand-tint2: #FFEDD5;
  --qx-accent: #6366F1;

  /* neutrals */
  --qx-bg: #FFFFFF;
  --qx-bg-alt: #FAFAFA;
  --qx-bg-rail: #FBFBFB;
  --qx-bg-code: #F6F8FA;
  --qx-bg-callout: #EFF6FF;
  --qx-border: #E5E7EB;
  --qx-border-soft: #F1F1F4;
  --qx-text: #0F172A;
  --qx-text-2: #334155;
  --qx-text-mute: #64748B;
  --qx-text-faint: #94A3B8;
  --qx-link: #C2410C;
  --qx-link-hover: #9A3412;

  /* layout */
  --qx-rail-w: 256px;
  --qx-toc-w: 220px;
  --qx-content-max: 740px;
  --qx-header-h: 56px;
  --qx-banner-h: 36px;

  /* radius */
  --qx-r-1: 4px;
  --qx-r-2: 6px;
  --qx-r-3: 8px;
  --qx-r-4: 12px;

  /* shadow */
  --qx-shadow-sm: 0 1px 2px rgba(15,23,42,.04);
  --qx-shadow-md: 0 4px 14px rgba(15,23,42,.06);
  --qx-shadow-lg: 0 12px 30px rgba(15,23,42,.08);
  --qx-ring-brand: 0 0 0 3px rgba(249,115,22,.18);

  /* type */
  --qx-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --qx-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --qx-fs-base: 16px;
  --qx-lh-base: 1.72;
}

[data-theme="dark"] {
  --qx-bg: #0B0F19;
  --qx-bg-alt: #0F172A;
  --qx-bg-rail: #0E141F;
  --qx-bg-code: #111827;
  --qx-bg-callout: #11212F;
  --qx-border: #1F2937;
  --qx-border-soft: #16202F;
  --qx-text: #E5E7EB;
  --qx-text-2: #C2CADA;
  --qx-text-mute: #94A3B8;
  --qx-text-faint: #64748B;
  --qx-link: #FDBA74;
  --qx-link-hover: #FED7AA;
  --qx-brand-tint: #271603;
  --qx-brand-tint2: #321B05;
  --qx-shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --qx-shadow-md: 0 4px 14px rgba(0,0,0,.4);
  --qx-shadow-lg: 0 12px 30px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--qx-font);
  font-size: var(--qx-fs-base);
  line-height: var(--qx-lh-base);
  color: var(--qx-text);
  background: var(--qx-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv01", "tnum";
}

img, svg { max-width: 100%; vertical-align: middle; }
a { color: var(--qx-link); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--qx-link-hover); text-decoration: underline; text-underline-offset: 2px; }

/* ============================================================
   top banner
   ============================================================ */
.qx-banner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: var(--qx-banner-h);
  padding: 0 16px;
  background: linear-gradient(90deg, rgba(249,115,22,.10), rgba(99,102,241,.10));
  border-bottom: 1px solid var(--qx-border-soft);
  font-size: 13px;
  color: var(--qx-text-2);
}
.qx-banner__icon { color: var(--qx-brand); display: inline-flex; }
.qx-banner__close {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  color: var(--qx-text-mute);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--qx-r-1);
}
.qx-banner__close:hover { background: var(--qx-border-soft); color: var(--qx-text); }

/* ============================================================
   header
   ============================================================ */
.qx-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.78);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--qx-border-soft);
}
[data-theme="dark"] .qx-header { background: rgba(11,15,25,.78); }
.qx-header__bar {
  height: var(--qx-header-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  max-width: 1480px;
  margin: 0 auto;
}
.qx-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--qx-text);
  font-weight: 600;
}
.qx-brand:hover { text-decoration: none; color: var(--qx-text); }
.qx-brand__mark { display: inline-flex; }
.qx-brand__wrap { display: flex; flex-direction: column; line-height: 1.1; }
.qx-brand__name { font-size: 15px; font-weight: 700; letter-spacing: .2px; }
.qx-brand__sub { font-size: 11px; color: var(--qx-text-mute); margin-top: 1px; letter-spacing: .8px; text-transform: uppercase; }

.qx-search {
  position: relative;
  flex: 0 1 360px;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px 0 34px;
  background: var(--qx-bg-alt);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.qx-search:focus-within { border-color: var(--qx-brand); background: var(--qx-bg); box-shadow: var(--qx-ring-brand); }
.qx-search__icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--qx-text-mute);
}
.qx-search__input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: 0;
  font: inherit;
  font-size: 13.5px;
  color: var(--qx-text);
}
.qx-search__input::placeholder { color: var(--qx-text-faint); }
.qx-search__kbd {
  font-family: var(--qx-font);
  font-size: 11px;
  color: var(--qx-text-mute);
  border: 1px solid var(--qx-border);
  background: var(--qx-bg);
  padding: 1px 5px;
  border-radius: 3px;
  letter-spacing: .3px;
}

.qx-topnav {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.qx-topnav__item {
  font-size: 13.5px;
  color: var(--qx-text-2);
  padding: 6px 10px;
  border-radius: var(--qx-r-2);
  text-decoration: none;
  transition: all .15s;
}
.qx-topnav__item:hover { background: var(--qx-brand-tint); color: var(--qx-brand-darker); text-decoration: none; }
.qx-topnav__item.is-active { color: var(--qx-brand-darker); background: var(--qx-brand-tint); font-weight: 600; }

.qx-header__right {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.qx-iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--qx-r-2);
  color: var(--qx-text-2);
  cursor: pointer;
  transition: all .15s;
}
.qx-iconbtn:hover { background: var(--qx-border-soft); color: var(--qx-text); border-color: var(--qx-border); }

.qx-mobile-only { display: none; }
@media (max-width: 980px) { .qx-mobile-only { display: inline-flex; } }

.qx-theme-toggle .qx-theme-light { display: inline-flex; }
.qx-theme-toggle .qx-theme-dark { display: none; }
[data-theme="dark"] .qx-theme-toggle .qx-theme-light { display: none; }
[data-theme="dark"] .qx-theme-toggle .qx-theme-dark { display: inline-flex; }

/* lang dropdown */
.qx-lang { position: relative; }
.qx-lang__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--qx-text-2);
  border-radius: var(--qx-r-2);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
}
.qx-lang__btn:hover { background: var(--qx-border-soft); color: var(--qx-text); }
.qx-lang__cur { font-weight: 500; }
.qx-lang__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 168px;
  background: var(--qx-bg);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  box-shadow: var(--qx-shadow-lg);
  padding: 4px;
  margin: 0;
  list-style: none;
  display: none;
  z-index: 60;
}
.qx-lang:hover .qx-lang__menu, .qx-lang:focus-within .qx-lang__menu { display: block; }
.qx-lang__menu li { list-style: none; }
.qx-lang__menu a {
  display: block;
  padding: 7px 10px;
  border-radius: var(--qx-r-2);
  color: var(--qx-text-2);
  text-decoration: none;
  font-size: 13px;
}
.qx-lang__menu a:hover { background: var(--qx-brand-tint); color: var(--qx-brand-darker); text-decoration: none; }
.qx-lang__menu a.is-current { color: var(--qx-brand-darker); font-weight: 600; }

/* ============================================================
   shell + sidebar (left rail)
   ============================================================ */
.qx-shell {
  max-width: 1480px;
  margin: 0 auto;
  display: block;
}
.qx-shell.has-rail {
  display: grid;
  grid-template-columns: var(--qx-rail-w) minmax(0, 1fr);
  align-items: start;
}

.qx-rail {
  position: sticky;
  top: var(--qx-header-h);
  align-self: start;
  height: calc(100vh - var(--qx-header-h));
  overflow: hidden;
  border-right: 1px solid var(--qx-border-soft);
  background: var(--qx-bg-rail);
  display: flex;
  flex-direction: column;
}
.qx-rail__head {
  padding: 14px 14px 8px;
  border-bottom: 1px solid var(--qx-border-soft);
}
.qx-rail__brandbox {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.qx-rail__mark { display: inline-flex; }
.qx-rail__brandtxt { display: flex; flex-direction: column; line-height: 1.1; }
.qx-rail__name { font-size: 13.5px; font-weight: 700; color: var(--qx-text); }
.qx-rail__sub { font-size: 11px; color: var(--qx-text-mute); margin-top: 2px; }

.qx-search--rail { width: 100%; height: 30px; font-size: 12.5px; padding-left: 30px; }
.qx-search--rail .qx-search__icon { left: 9px; }
.qx-search--rail .qx-search__kbd { font-size: 10px; padding: 0 4px; }

.qx-rail__inner {
  flex: 1;
  overflow-y: auto;
  padding: 8px 6px 14px;
  scrollbar-width: thin;
}
.qx-rail__inner::-webkit-scrollbar { width: 8px; }
.qx-rail__inner::-webkit-scrollbar-thumb { background: var(--qx-border); border-radius: 4px; }

.qx-rail__group { margin: 8px 0 12px; }
.qx-rail__heading {
  display: flex;
  align-items: center;
  padding: 8px 10px 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--qx-text-mute);
}
.qx-rail__heading--top { color: var(--qx-brand-darker); }
.qx-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.qx-rail__list li { list-style: none; }
.qx-rail__link {
  display: flex;
  align-items: center;
  padding: 5px 12px;
  font-size: 13px;
  color: var(--qx-text-2);
  border-left: 2px solid transparent;
  text-decoration: none;
  border-radius: 0 4px 4px 0;
  transition: all .12s;
}
.qx-rail__link:hover { color: var(--qx-text); background: var(--qx-brand-tint); text-decoration: none; }
.qx-rail__link.is-active {
  color: var(--qx-brand-darker);
  background: var(--qx-brand-tint);
  border-left-color: var(--qx-brand);
  font-weight: 600;
}

.qx-rail__sub {
  margin: 6px 0;
}
.qx-rail__subhead {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--qx-text);
  cursor: pointer;
  border-radius: var(--qx-r-2);
  user-select: none;
}
.qx-rail__subhead:hover { background: var(--qx-border-soft); }
.qx-rail__chev { display: inline-flex; color: var(--qx-text-mute); transition: transform .15s; }
.qx-rail__sub.is-collapsed .qx-rail__chev { transform: rotate(-90deg); }
.qx-rail__sub.is-collapsed .qx-rail__list { display: none; }
.qx-rail__count {
  margin-left: auto;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--qx-text-faint);
  background: var(--qx-border-soft);
  padding: 1px 6px;
  border-radius: 8px;
}
.qx-rail__list--inner .qx-rail__link { padding-left: 24px; font-size: 12.5px; }
.qx-rail__list--inner .qx-rail__link--cat { color: var(--qx-text-mute); font-style: italic; }

.qx-rail__foot {
  padding: 10px 14px;
  border-top: 1px solid var(--qx-border-soft);
  display: flex;
  align-items: center;
  gap: 10px;
}
.qx-rail__footlink { color: var(--qx-text-mute); display: inline-flex; }
.qx-rail__footlink:hover { color: var(--qx-text); text-decoration: none; }
.qx-rail__theme { width: 28px; height: 28px; }

/* mobile rail */
@media (max-width: 980px) {
  .qx-shell.has-rail { grid-template-columns: 1fr; }
  .qx-rail {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    height: 100vh;
    z-index: 70;
    transform: translateX(-100%);
    transition: transform .25s ease;
    box-shadow: var(--qx-shadow-lg);
  }
  .qx-rail.is-open { transform: translateX(0); }
  body.qx-rail-open { overflow: hidden; }
}

/* ============================================================
   main + doc
   ============================================================ */
.qx-main {
  min-width: 0;
  padding: 28px 40px 80px;
}
.qx-shell:not(.has-rail) .qx-main { max-width: 1080px; margin: 0 auto; }
@media (max-width: 980px) { .qx-main { padding: 20px 18px 60px; } }

.qx-doc {
  max-width: var(--qx-content-max);
  margin: 0 auto;
}
.qx-doc--list, .qx-doc--page { max-width: var(--qx-content-max); }
.qx-doc--home { max-width: 1080px; }
.qx-doc--post { max-width: 1080px; }

.qx-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--qx-text-mute);
  margin-bottom: 14px;
}
.qx-crumb a { color: var(--qx-text-mute); }
.qx-crumb a:hover { color: var(--qx-brand-darker); }
.qx-crumb__sep { color: var(--qx-text-faint); }
.qx-crumb__current { color: var(--qx-text); }

.qx-doc__head { margin-bottom: 22px; }
.qx-doc__h1 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.18;
  letter-spacing: -.02em;
  font-weight: 700;
  color: var(--qx-text);
}
.qx-doc__lede {
  margin: 6px 0 12px;
  font-size: 15px;
  color: var(--qx-text-mute);
  line-height: 1.6;
}
.qx-doc__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.qx-doc__chip {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: var(--qx-r-2);
  background: var(--qx-bg-alt);
  border: 1px solid var(--qx-border);
  color: var(--qx-text-mute);
}
.qx-doc__chip--link { color: var(--qx-brand-darker); border-color: var(--qx-brand-tint2); background: var(--qx-brand-tint); text-decoration: none; }
.qx-doc__chip--link:hover { background: var(--qx-brand-tint2); text-decoration: none; }

.qx-doc__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.qx-actbtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  padding: 4px 9px;
  background: var(--qx-bg-alt);
  border: 1px solid var(--qx-border);
  color: var(--qx-text-2);
  border-radius: var(--qx-r-2);
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
}
.qx-actbtn:hover { background: var(--qx-brand-tint); color: var(--qx-brand-darker); border-color: var(--qx-brand-tint2); text-decoration: none; }

/* doc body — three column on post */
.qx-doc--post .qx-doc__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--qx-toc-w);
  gap: 48px;
  align-items: start;
}
@media (max-width: 1180px) {
  .qx-doc--post .qx-doc__body { grid-template-columns: 1fr; gap: 24px; }
}

/* ============================================================
   prose — markdown content
   ============================================================ */
.qx-prose {
  color: var(--qx-text);
  font-size: 15.5px;
  line-height: 1.78;
}
.qx-prose > :first-child { margin-top: 0; }
.qx-prose h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--qx-text);
  margin: 38px 0 14px;
  padding-top: 4px;
  scroll-margin-top: 80px;
}
.qx-prose h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--qx-text);
  margin: 24px 0 10px;
  scroll-margin-top: 80px;
}
.qx-prose h4 { font-size: 15px; font-weight: 600; margin: 18px 0 8px; }
.qx-prose p { margin: 0 0 14px; }
.qx-prose ul, .qx-prose ol { margin: 0 0 14px; padding-left: 24px; }
.qx-prose li { margin: 4px 0; }
.qx-prose ul li::marker { color: var(--qx-brand); }
.qx-prose strong { font-weight: 600; color: var(--qx-text); }
.qx-prose em { color: var(--qx-text-2); }
.qx-prose hr { border: 0; border-top: 1px solid var(--qx-border); margin: 32px 0; }

.qx-prose a {
  color: var(--qx-link);
  text-decoration: underline;
  text-underline-offset: 2.5px;
  text-decoration-thickness: 1px;
}
.qx-prose a:hover { color: var(--qx-link-hover); text-decoration-thickness: 2px; }

.qx-prose code {
  font-family: var(--qx-font-mono);
  font-size: .88em;
  color: var(--qx-brand-darker);
  background: var(--qx-brand-tint);
  padding: 1.5px 5px;
  border-radius: 4px;
  border: 1px solid var(--qx-brand-tint2);
}
.qx-prose pre {
  position: relative;
  margin: 16px 0 18px;
  padding: 14px 16px;
  background: var(--qx-bg-code);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}
.qx-prose pre code {
  font-family: var(--qx-font-mono);
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--qx-text);
  font-size: inherit;
}
.qx-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--qx-font);
  font-size: 11px;
  padding: 3px 8px;
  background: var(--qx-bg);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-2);
  color: var(--qx-text-mute);
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s, color .15s;
}
.qx-prose pre:hover .qx-copy { opacity: 1; }
.qx-copy:hover { color: var(--qx-brand-darker); border-color: var(--qx-brand-tint2); }

.qx-prose blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--qx-bg-callout);
  border-left: 3px solid var(--qx-accent);
  border-radius: 0 var(--qx-r-3) var(--qx-r-3) 0;
  color: var(--qx-text-2);
}
.qx-prose blockquote > :last-child { margin-bottom: 0; }

/* table */
.qx-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 22px;
  font-size: 13.5px;
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  overflow: hidden;
  display: block;
  overflow-x: auto;
}
.qx-prose thead { background: var(--qx-bg-alt); }
.qx-prose th, .qx-prose td {
  padding: 9px 14px;
  text-align: left;
  border-bottom: 1px solid var(--qx-border-soft);
  vertical-align: top;
}
.qx-prose th { font-weight: 600; color: var(--qx-text); white-space: nowrap; }
.qx-prose tbody tr:last-child td { border-bottom: 0; }
.qx-prose tbody tr:hover { background: var(--qx-brand-tint); }

.qx-prose img { display: block; margin: 16px auto; border-radius: var(--qx-r-3); }

/* heading anchor (auto generated) */
.qx-prose h2 a, .qx-prose h3 a, .qx-prose h4 a {
  text-decoration: none;
  color: inherit;
}
.qx-prose h2 a:hover, .qx-prose h3 a:hover { color: var(--qx-brand); }

/* ============================================================
   right TOC
   ============================================================ */
.qx-toc {
  font-size: 13px;
  align-self: start;
}
.qx-toc__inner {
  position: sticky;
  top: calc(var(--qx-header-h) + 16px);
  max-height: calc(100vh - var(--qx-header-h) - 32px);
  overflow-y: auto;
  padding-left: 12px;
  border-left: 1px solid var(--qx-border-soft);
}
.qx-toc__head {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--qx-text-mute);
  margin: 0 0 8px;
}
.qx-toc__head--alt { margin-top: 18px; }
.qx-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.qx-toc__list li { list-style: none; }
.qx-toc__item a {
  display: block;
  padding: 3px 0;
  color: var(--qx-text-mute);
  font-size: 12.5px;
  line-height: 1.55;
  text-decoration: none;
  transition: color .12s;
}
.qx-toc__item--lv3 a { padding-left: 14px; font-size: 12px; color: var(--qx-text-faint); }
.qx-toc__item a:hover { color: var(--qx-brand-darker); text-decoration: none; }
.qx-toc__item a.is-active { color: var(--qx-brand-darker); font-weight: 600; }

.qx-toc__more { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--qx-border-soft); }
.qx-toc__list--alt a { color: var(--qx-text-2); }

@media (max-width: 1180px) {
  .qx-toc { display: none; }
}

/* ============================================================
   prev / next
   ============================================================ */
.qx-prevnext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 36px 0 0;
  border-top: 1px solid var(--qx-border);
  padding-top: 18px;
}
.qx-prevnext__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  text-decoration: none;
  background: var(--qx-bg);
  transition: all .15s;
  min-height: 64px;
}
.qx-prevnext__cell:hover { border-color: var(--qx-brand); background: var(--qx-brand-tint); text-decoration: none; }
.qx-prevnext__cell--next { text-align: right; align-items: flex-end; }
.qx-prevnext__cell--empty { background: transparent; border-color: transparent; }
.qx-prevnext__cell--empty:hover { background: transparent; border-color: transparent; }
.qx-prevnext__lab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  color: var(--qx-text-mute);
  letter-spacing: .3px;
}
.qx-prevnext__t { color: var(--qx-text); font-size: 14px; font-weight: 600; line-height: 1.4; }

@media (max-width: 720px) {
  .qx-prevnext { grid-template-columns: 1fr; }
}

/* ============================================================
   home — hero
   ============================================================ */
.qx-hero {
  text-align: center;
  padding: 50px 0 28px;
  border-bottom: 1px solid var(--qx-border-soft);
  margin-bottom: 40px;
}
.qx-hero__mark { display: inline-flex; margin-bottom: 12px; }
.qx-hero__title {
  margin: 0 0 12px;
  font-size: 38px;
  letter-spacing: -.025em;
  font-weight: 700;
  color: var(--qx-text);
  line-height: 1.15;
}
.qx-hero__lede {
  margin: 0 auto 22px;
  max-width: 560px;
  font-size: 15px;
  color: var(--qx-text-mute);
  line-height: 1.65;
}
.qx-hero__search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  width: 100%;
  max-width: 460px;
  margin: 0 auto 16px;
  padding: 0 14px 0 42px;
  background: var(--qx-bg);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  box-shadow: var(--qx-shadow-sm);
  transition: border-color .15s, box-shadow .15s;
}
.qx-hero__search:focus-within { border-color: var(--qx-brand); box-shadow: var(--qx-ring-brand); }
.qx-hero__searchicon { position: absolute; left: 14px; color: var(--qx-text-mute); }
.qx-hero__searchinput { flex: 1; border: 0; background: transparent; outline: 0; font: inherit; font-size: 14.5px; }
.qx-hero__searchinput::placeholder { color: var(--qx-text-faint); }
.qx-hero__chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  max-width: 640px;
  margin: 6px auto 0;
}
.qx-hero__chip {
  font-size: 12.5px;
  padding: 4px 10px;
  background: var(--qx-bg-alt);
  border: 1px solid var(--qx-border);
  border-radius: 20px;
  color: var(--qx-text-2);
  text-decoration: none;
}
.qx-hero__chip:hover { background: var(--qx-brand-tint); color: var(--qx-brand-darker); border-color: var(--qx-brand-tint2); text-decoration: none; }

/* ============================================================
   sections + cards
   ============================================================ */
.qx-section { margin: 40px 0; }
.qx-section__head { margin-bottom: 18px; }
.qx-section__h {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.012em;
  color: var(--qx-text);
}
.qx-section__sub { margin: 0; color: var(--qx-text-mute); font-size: 14px; }

.qx-cardgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
@media (max-width: 720px) { .qx-cardgrid { grid-template-columns: 1fr; } }
.qx-cardgrid--cats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 980px) { .qx-cardgrid--cats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .qx-cardgrid--cats { grid-template-columns: 1fr; } }

.qx-card {
  position: relative;
  display: block;
  padding: 18px 18px 16px;
  background: var(--qx-bg);
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  text-decoration: none;
  color: var(--qx-text);
  transition: all .18s;
}
.qx-card:hover {
  border-color: var(--qx-brand);
  box-shadow: var(--qx-shadow-md);
  transform: translateY(-1px);
  text-decoration: none;
}
.qx-card__num {
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--qx-font-mono);
  font-size: 11px;
  color: var(--qx-text-faint);
  letter-spacing: .5px;
}
.qx-card__title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--qx-text);
  margin-bottom: 6px;
  letter-spacing: -.005em;
}
.qx-card__desc {
  font-size: 13.5px;
  color: var(--qx-text-mute);
  line-height: 1.55;
  margin: 0 0 10px;
}
.qx-card__list {
  list-style: none;
  margin: 8px 0 0;
  padding: 8px 0 0;
  border-top: 1px dashed var(--qx-border-soft);
}
.qx-card__list li {
  display: flex;
  gap: 4px;
  font-size: 12.5px;
  color: var(--qx-text-2);
  padding: 2px 0;
  line-height: 1.5;
  list-style: none;
}
.qx-card__bullet { color: var(--qx-brand); display: inline-flex; flex-shrink: 0; margin-top: 2px; }
.qx-card__more {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--qx-brand-darker);
  font-weight: 500;
}
.qx-card__count {
  margin-top: 8px;
  display: inline-block;
  font-size: 11.5px;
  color: var(--qx-text-mute);
  background: var(--qx-bg-alt);
  border: 1px solid var(--qx-border-soft);
  padding: 2px 8px;
  border-radius: 10px;
}

/* reflist (overflow categories) */
.qx-reflist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 22px;
}
@media (max-width: 720px) { .qx-reflist { grid-template-columns: 1fr; } }
.qx-reflist__item { list-style: none; padding: 6px 0; border-bottom: 1px solid var(--qx-border-soft); }
.qx-reflist__item a { color: var(--qx-text); text-decoration: none; display: block; }
.qx-reflist__item strong { color: var(--qx-brand-darker); margin-right: 8px; }
.qx-reflist__desc { color: var(--qx-text-mute); font-size: 13px; }

/* ============================================================
   post list (latest articles, list page, tag page)
   ============================================================ */
.qx-postlist {
  list-style: none;
  margin: 0;
  padding: 0;
}
.qx-postlist__item {
  list-style: none;
  padding: 14px 0;
  border-bottom: 1px solid var(--qx-border-soft);
}
.qx-postlist__item:first-child { padding-top: 0; }
.qx-postlist__title {
  display: inline-block;
  font-size: 16px;
  font-weight: 600;
  color: var(--qx-text);
  text-decoration: none;
  margin-bottom: 4px;
  line-height: 1.45;
}
.qx-postlist__title:hover { color: var(--qx-brand-darker); text-decoration: none; }
.qx-postlist__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--qx-text-mute);
  margin: 4px 0;
}
.qx-postlist__date { color: var(--qx-text-mute); }
.qx-postlist__chip {
  background: var(--qx-brand-tint);
  color: var(--qx-brand-darker);
  padding: 1px 7px;
  border-radius: 9px;
  font-size: 11px;
  font-weight: 500;
}
.qx-postlist__desc {
  margin: 4px 0 0;
  font-size: 13.5px;
  color: var(--qx-text-mute);
  line-height: 1.55;
}

.qx-viewall { margin: 16px 0 0; }
.qx-viewall a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--qx-brand-darker);
}
.qx-viewall a:hover { color: var(--qx-link-hover); text-decoration: underline; }

/* ============================================================
   FAQ
   ============================================================ */
.qx-faq {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.qx-faq__item {
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-3);
  background: var(--qx-bg);
  overflow: hidden;
  transition: border-color .15s;
}
.qx-faq__item[open] { border-color: var(--qx-brand-tint2); }
.qx-faq__q {
  list-style: none;
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--qx-text);
  position: relative;
  padding-right: 36px;
}
.qx-faq__q::-webkit-details-marker { display: none; }
.qx-faq__q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--qx-brand);
  font-weight: 400;
}
.qx-faq__item[open] .qx-faq__q::after { content: "−"; }
.qx-faq__a {
  padding: 0 16px 14px;
  font-size: 14px;
  color: var(--qx-text-2);
  line-height: 1.7;
  border-top: 1px solid var(--qx-border-soft);
  padding-top: 12px;
}
.qx-faq__a > p:last-child { margin-bottom: 0; }
.qx-faq__a a { color: var(--qx-brand-darker); }

/* ============================================================
   pager
   ============================================================ */
.qx-pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin: 36px 0 12px;
}
.qx-pager__btn, .qx-pager__num {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-width: 30px;
  height: 30px;
  padding: 0 10px;
  font-size: 13px;
  border: 1px solid var(--qx-border);
  border-radius: var(--qx-r-2);
  color: var(--qx-text-2);
  background: var(--qx-bg);
  text-decoration: none;
  justify-content: center;
}
.qx-pager__btn:hover, .qx-pager__num:hover { border-color: var(--qx-brand); color: var(--qx-brand-darker); background: var(--qx-brand-tint); text-decoration: none; }
.qx-pager__num.is-current {
  background: var(--qx-brand);
  border-color: var(--qx-brand);
  color: #FFFFFF;
  font-weight: 600;
}
.qx-pager__btn.is-disabled, .qx-pager__num.is-disabled {
  color: var(--qx-text-faint);
  pointer-events: none;
  background: var(--qx-bg-alt);
}

/* ============================================================
   ask-AI floating
   ============================================================ */
.qx-ask {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  background: var(--qx-text);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 500;
  border: 0;
  border-radius: 24px;
  box-shadow: var(--qx-shadow-lg);
  cursor: pointer;
  transition: transform .15s, background .15s;
}
.qx-ask:hover { background: var(--qx-brand); transform: translateY(-2px); }
[data-theme="dark"] .qx-ask { background: var(--qx-brand); }
[data-theme="dark"] .qx-ask:hover { background: var(--qx-brand-soft); }
@media (max-width: 720px) { .qx-ask span { display: none; } .qx-ask { padding: 10px; border-radius: 50%; } }

/* ============================================================
   404
   ============================================================ */
.qx-404 {
  max-width: 520px;
  margin: 80px auto;
  text-align: center;
  padding: 0 20px;
}
.qx-404__code {
  font-family: var(--qx-font-mono);
  font-size: 84px;
  font-weight: 700;
  color: var(--qx-brand);
  line-height: 1;
}
.qx-404__title { font-size: 22px; margin: 16px 0 8px; color: var(--qx-text); }
.qx-404__body { color: var(--qx-text-mute); font-size: 15px; margin-bottom: 26px; }
.qx-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--qx-r-3);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all .15s;
}
.qx-btn--primary { background: var(--qx-brand); color: #FFFFFF; }
.qx-btn--primary:hover { background: var(--qx-brand-darker); color: #FFFFFF; text-decoration: none; }

/* ============================================================
   footer
   ============================================================ */
.qx-footer {
  margin-top: 60px;
  padding: 36px 0 22px;
  border-top: 1px solid var(--qx-border-soft);
  background: var(--qx-bg-alt);
  font-size: 13.5px;
  color: var(--qx-text-mute);
}
.qx-footer__inner {
  max-width: 1480px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 36px;
}
@media (max-width: 980px) { .qx-footer__inner { grid-template-columns: 1fr; gap: 22px; padding: 0 18px; } }

.qx-footer__lead {}
.qx-footer__brandline { display: flex; align-items: center; gap: 8px; }
.qx-footer__mark { display: inline-flex; }
.qx-footer__brand { font-size: 16px; font-weight: 700; color: var(--qx-text); }
.qx-footer__tag { font-size: 11px; color: var(--qx-text-mute); border: 1px solid var(--qx-border); padding: 1px 6px; border-radius: 4px; letter-spacing: .8px; text-transform: uppercase; }
.qx-footer__desc { margin: 12px 0 0; font-size: 13px; color: var(--qx-text-mute); line-height: 1.65; max-width: 320px; }

.qx-footer__cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
@media (max-width: 720px) { .qx-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.qx-footer__col h, .qx-footer__h { font-size: 12px; font-weight: 700; letter-spacing: .9px; text-transform: uppercase; color: var(--qx-text); margin-bottom: 8px; }
.qx-footer__col ul { list-style: none; margin: 0; padding: 0; }
.qx-footer__col li { padding: 3px 0; list-style: none; }
.qx-footer__col a { color: var(--qx-text-mute); text-decoration: none; font-size: 13px; }
.qx-footer__col a:hover { color: var(--qx-brand-darker); text-decoration: none; }
.qx-footer__lang { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.qx-footer__lang a.is-current { color: var(--qx-brand-darker); font-weight: 600; }

.qx-footer__bottom {
  max-width: 1480px;
  margin: 22px auto 0;
  padding: 16px 32px 0;
  border-top: 1px solid var(--qx-border-soft);
  font-size: 12px;
  color: var(--qx-text-faint);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
@media (max-width: 980px) { .qx-footer__bottom { padding: 16px 18px 0; } }
.qx-footer__rights { font-weight: 500; color: var(--qx-text-mute); }
.qx-footer__risk { margin: 0; line-height: 1.6; max-width: 940px; }

/* ============================================================
   utilities
   ============================================================ */
.qx-prose details { margin: 12px 0; }
.qx-prose details summary { cursor: pointer; font-weight: 600; }

.qx-body.is-home .qx-main { padding-top: 8px; }

/* selection */
::selection { background: var(--qx-brand-tint2); color: var(--qx-brand-darker); }

/* focus */
:focus-visible {
  outline: 2px solid var(--qx-brand);
  outline-offset: 2px;
  border-radius: var(--qx-r-1);
}

/* Print */
@media print {
  .qx-header, .qx-rail, .qx-toc, .qx-banner, .qx-ask, .qx-prevnext, .qx-footer { display: none !important; }
  .qx-shell.has-rail { grid-template-columns: 1fr; }
  .qx-main { padding: 0; }
  .qx-doc { max-width: 100%; }
  body { background: #fff; color: #000; }
}

/* dark theme — ensure card hover doesn't blow out */
[data-theme="dark"] .qx-prose tbody tr:hover { background: rgba(249,115,22,.06); }
[data-theme="dark"] .qx-card:hover { background: var(--qx-bg-alt); }
[data-theme="dark"] .qx-postlist__chip { background: rgba(249,115,22,.18); color: #FED7AA; }

/* small screen tweaks */
@media (max-width: 720px) {
  .qx-doc__h1 { font-size: 26px; }
  .qx-hero__title { font-size: 28px; }
  .qx-hero { padding: 30px 0 20px; }
  .qx-section { margin: 28px 0; }
  .qx-prose { font-size: 15px; }
  .qx-prose h2 { font-size: 19px; }
  .qx-prose h3 { font-size: 16px; }
}

/* hide topnav on narrow */
@media (max-width: 1080px) {
  .qx-topnav { display: none; }
  .qx-search--header { flex: 1 1 auto; }
}
@media (max-width: 720px) {
  .qx-search--header { display: none; }
  .qx-header__bar { padding: 0 14px; gap: 10px; }
}

/* end */