/* =========================================================
   尊龙官网 · /assets/site.css
   共享外壳：reset / tokens / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,details,summary{margin:0;}
ul,ol{padding:0;list-style:none;}
img,picture,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;}
hr{border:0;}

/* ---------- 2. tokens ---------- */
:root{
  color-scheme:dark;

  --ink-950:#0B0E11;
  --graphite-800:#171C22;
  --slate-600:#2C343D;
  --silver-300:#9BA6B2;
  --paper-50:#F7F4EE;
  --mist-100:#E8ECF1;
  --cinnabar-500:#D3342B;
  --cyan-spark-400:#17D6C8;
  --moss-600:#4F6B4A;
  --clay-500:#B0673F;
  --amber-400:#E0A020;

  --bg:var(--ink-950);
  --bg-2:var(--graphite-800);
  --bg-3:#12171D;
  --line:var(--slate-600);
  --line-soft:rgba(44,52,61,.72);
  --text:var(--mist-100);
  --text-2:var(--silver-300);
  --text-3:#848F9B;
  --grid:rgba(155,166,178,.065);
  --shadow:0 12px 28px rgba(0,0,0,.42);

  --cinnabar-ink:#E8564B;
  --cyan-ink:#2FE4D5;
  --moss-ink:#90B183;
  --clay-ink:#CE8353;
  --amber-ink:#F1BA42;

  --font-sans:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,"SF Mono",Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --gutter:clamp(16px,3.2vw,40px);
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --header-offset:118px;
}

:root[data-theme="paper"]{
  color-scheme:light;
  --bg:#F1ECE2;
  --bg-2:#FBF8F1;
  --bg-3:#E8E1D4;
  --line:#C9C0B0;
  --line-soft:rgba(140,128,110,.45);
  --text:#101720;
  --text-2:#454E59;
  --text-3:#6C7580;
  --grid:rgba(16,23,32,.055);
  --shadow:0 10px 22px rgba(70,58,40,.16);
  --cinnabar-ink:#B3251D;
  --cyan-ink:#0A7C74;
  --moss-ink:#3D5A39;
  --clay-ink:#8A4C2A;
  --amber-ink:#8A6208;
}

/* ---------- 3. 中文排版与基础 ---------- */
body{
  min-height:100vh;
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(to right,var(--grid) 1px,transparent 1px),
    linear-gradient(to bottom,var(--grid) 1px,transparent 1px);
  background-size:74px 74px;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}

h1,h2,h3,h4{font-weight:700;line-height:1.28;letter-spacing:.04em;color:var(--text);}
h1{font-size:clamp(26px,3.4vw,44px);}
h2{font-size:clamp(20px,2.2vw,28px);}
h3{font-size:17px;font-weight:600;}
h4{font-size:15px;font-weight:500;}
p{line-height:1.75;}
strong{color:var(--text);font-weight:600;}

:focus-visible{
  outline:2px solid var(--amber-400);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(224,160,32,.22);
  border-radius:var(--radius);
}

::selection{background:rgba(211,52,43,.4);color:var(--paper-50);}

/* ---------- 4. 通用容器与排版工具 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:clamp(40px,6vw,84px);}
.section--tight{padding-block:clamp(26px,4vw,52px);}
.site-main{padding-top:clamp(28px,4vw,48px);}

.display-title{
  font-size:clamp(28px,4vw,56px);
  font-weight:700;
  line-height:1.1;
  letter-spacing:.06em;
  font-stretch:condensed;
  color:var(--text);
}
.lede{
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.85;
  color:var(--text-2);
  max-width:38em;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--text-3);
  text-transform:uppercase;
}
.mono{font-family:var(--font-mono);letter-spacing:.08em;}
.mono-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:10.5px;
  line-height:1.5;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-3);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:1px 5px;
  white-space:nowrap;
}
.prose{
  max-width:42em;
  color:var(--text-2);
  font-size:16px;
  line-height:1.75;
}
.prose p+p{margin-top:14px;}
.prose h2{margin-top:32px;margin-bottom:12px;color:var(--text);}
.prose h3{margin-top:24px;margin-bottom:10px;color:var(--text);}
.prose ul,.prose ol{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.prose li{padding-left:18px;position:relative;}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:7px;height:2px;
  background:var(--cinnabar-500);
}
.aside-note{
  border-left:2px solid var(--moss-600);
  padding:10px 0 10px 14px;
  font-size:13px;
  line-height:1.8;
  color:var(--text-3);
}
.link-plain{
  color:var(--text);
  border-bottom:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-plain:hover{color:var(--amber-ink);border-bottom-color:var(--amber-400);}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.rule-print{
  height:1px;
  margin-block:clamp(24px,3.4vw,44px);
  background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 14px);
}

/* ---------- 5. skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;
  background:var(--amber-400);
  color:#0B0E11;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  border-radius:var(--radius);
  box-shadow:0 8px 20px rgba(0,0,0,.5);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);outline:none;box-shadow:0 0 0 2px var(--ink-950),0 0 0 4px var(--cinnabar-500);}

/* ---------- 6. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--bg);
  border-bottom:1px solid var(--line);
}

/* 6.1 上层窄条 */
.utility-bar{
  background:var(--bg-2);
  border-bottom:1px solid var(--line-soft);
}
.utility-bar__inner{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:34px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--text-2);
}
.utility-bar__brand{
  display:flex;
  align-items:center;
  gap:8px;
  min-width:0;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.utility-bar__pulse{
  flex:0 0 auto;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan-ink);
  box-shadow:0 0 0 3px rgba(23,214,200,.16);
  animation:pulse 3.6s var(--ease) infinite;
}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.32;}}
.utility-bar__meta{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:auto;
}
.utility-bar__item{display:flex;align-items:center;gap:6px;white-space:nowrap;}
.utility-bar__tools{display:flex;align-items:center;gap:8px;flex:0 0 auto;}

.util-chip{
  display:inline-flex;
  align-items:center;
  padding:2px 9px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--text-2);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.util-chip--btn:hover{color:var(--text);border-color:var(--amber-400);}
.util-chip--btn[aria-pressed="true"]{
  color:var(--amber-ink);
  border-color:var(--amber-400);
  background:rgba(224,160,32,.08);
}

/* 6.2 主栏目带 */
.nav-band{background:var(--bg);}
.nav-band__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  min-height:64px;
  padding-block:10px;
}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;height:34px;
  border:1px solid var(--cinnabar-500);
  border-radius:var(--radius);
  background:linear-gradient(140deg,rgba(211,52,43,.22),transparent 68%);
  color:var(--cinnabar-ink);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.brand__text{
  display:flex;
  flex-direction:column;
  font-size:16px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.1em;
  color:var(--text);
  white-space:nowrap;
}
.brand__sub{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:400;
  letter-spacing:.12em;
  color:var(--text-3);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:9px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--amber-400);}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px;flex:0 0 auto;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;left:0;right:0;height:2px;
  background:var(--amber-400);
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle__bars::before{top:2px;}
.nav-toggle__bars::after{top:8px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg);}
.nav-toggle__text{white-space:nowrap;}

.site-nav{
  display:flex;
  align-items:center;
  gap:14px;
  flex:1 1 auto;
  min-width:0;
}
.site-nav__list{display:flex;align-items:center;gap:2px;}
.site-nav__item{--dot:var(--silver-300);}
.site-nav__item--01{--dot:#9BA6B2;}
.site-nav__item--02{--dot:#6F8F67;}
.site-nav__item--03{--dot:var(--cyan-spark-400);}
.site-nav__item--04{--dot:var(--clay-500);}
.site-nav__item--05{--dot:var(--cinnabar-500);}
.site-nav__item--06{--dot:var(--amber-400);}

.site-nav__link{
  display:flex;
  align-items:center;
  gap:7px;
  padding:9px 10px;
  border:1px solid transparent;
  border-bottom:2px solid transparent;
  border-radius:var(--radius) var(--radius) 0 0;
  color:var(--text-2);
  font-size:14px;
  letter-spacing:.06em;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.site-nav__link:hover{
  color:var(--text);
  background:var(--bg-2);
  border-color:var(--line);
  border-bottom-color:var(--dot);
  transform:translateY(-2px);
}
.site-nav__link[aria-current="page"]{
  color:var(--text);
  background:var(--bg-2);
  border-color:var(--line);
  border-bottom-color:var(--dot);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--dot);}
.site-nav__link[aria-current="page"] .site-nav__dot{box-shadow:0 0 8px var(--dot);}
.site-nav__num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--text-3);
}
.site-nav__dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:1px;
  background:var(--dot);
}

.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto;flex:0 0 auto;}

/* 6.3 进度条 */
.progress-rail{position:relative;height:2px;background:transparent;overflow:hidden;}
.progress-rail__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cinnabar-500),var(--amber-400) 55%,var(--cyan-spark-400));
  transition:width .12s linear;
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  color:var(--text);
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  text-align:center;
  transition:transform .18s var(--ease),border-color .18s var(--ease),
             background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px);border-color:var(--text-2);}
.btn--sm{padding:8px 13px;font-size:13px;}
.btn--ghost{background:transparent;color:var(--text-2);}
.btn--ghost:hover{background:var(--bg-2);color:var(--text);border-color:var(--line);}
.btn--cinnabar{
  border-color:var(--cinnabar-500);
  background:linear-gradient(180deg,rgba(211,52,43,.94),rgba(211,52,43,.74));
  color:#FFF6F4;
}
.btn--cinnabar:hover{
  border-color:#F06A60;
  box-shadow:0 8px 20px rgba(211,52,43,.34);
}
.btn--cyan{
  border-color:var(--cyan-spark-400);
  background:linear-gradient(180deg,#31E7D9,#12B3A8);
  color:#06181A;
}
.btn--cyan:hover{box-shadow:0 8px 20px rgba(23,214,200,.3);}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- 8. 通用块与网格 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 18px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,34px);
  border-bottom:1px solid var(--line);
}
.section-head__num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--amber-ink);
}
.section-head__title{font-size:clamp(20px,2.4vw,28px);font-weight:700;letter-spacing:.06em;}
.section-head__note{margin-left:auto;max-width:46ch;font-size:13px;color:var(--text-3);}

.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,24px);}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,24px);}
.grid-split{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:clamp(20px,3.4vw,48px);
  align-items:start;
}
.col-index{position:sticky;top:var(--header-offset);align-self:start;}

.card{
  padding:clamp(16px,2.2vw,24px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--text-3);box-shadow:var(--shadow);}
.card__head{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--text-3);
}
.card__title{margin-top:10px;font-size:17px;font-weight:600;letter-spacing:.04em;color:var(--text);}
.card__body{margin-top:8px;font-size:14px;line-height:1.8;color:var(--text-2);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--text-2);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  white-space:nowrap;
}
.tag--moss{color:var(--moss-ink);border-color:var(--moss-600);}
.tag--clay{color:var(--clay-ink);border-color:var(--clay-500);}
.tag--cinnabar{color:var(--cinnabar-ink);border-color:var(--cinnabar-500);}
.tag--cyan{color:var(--cyan-ink);border-color:var(--cyan-spark-400);}
.tag--amber{color:var(--amber-ink);border-color:var(--amber-400);}

/* 目录型索引 */
.index-list{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.index-list__item{border-bottom:1px solid var(--line-soft);}
.index-list__link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:13px 4px;
  color:var(--text-2);
  font-size:14px;
  letter-spacing:.03em;
  transition:color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.index-list__link:hover{color:var(--text);transform:translateX(3px);}
.index-list__link.is-active{
  color:var(--text);
  border-left:2px solid var(--amber-400);
  padding-left:10px;
}
.index-list__num{font-family:var(--font-mono);font-size:11px;color:var(--text-3);}

/* 折叠面板 */
.panel{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
}
.panel+.panel{margin-top:10px;}
.panel__summary{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 16px;
  cursor:pointer;
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  list-style:none;
  transition:background-color .18s var(--ease);
}
.panel__summary::-webkit-details-marker{display:none;}
.panel__summary::after{
  content:"＋";
  margin-left:auto;
  font-family:var(--font-mono);
  color:var(--amber-ink);
}
.panel[open]>.panel__summary::after{content:"－";}
.panel__summary:hover{background:var(--bg-3);}
.panel__body{padding:0 16px 16px;font-size:14px;line-height:1.8;color:var(--text-2);}

/* 面包屑 */
.breadcrumb{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--text-3);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--line);}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--amber-ink);}

/* 图片容器基础规则（供页面阶段放置图片） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
}
.media-frame>img,.media-frame>svg,.media-frame>picture>img{
  width:100%;height:100%;object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 4px);
}
.media-frame[data-caption]::before{
  content:attr(data-caption);
  position:absolute;left:0;bottom:0;z-index:2;
  padding:4px 9px;
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  background:var(--bg);
  color:var(--text-2);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
}
.media-frame__label{
  position:absolute;inset:0;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(155,166,178,.09),transparent 62%);
  color:var(--text-3);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  text-align:center;
  padding:12px;
}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--tall{aspect-ratio:4/5;}
.media-frame--slice{aspect-ratio:3/1;}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--bg-3);
  border-top:1px solid var(--line);
  color:var(--text-2);
}
.site-footer .shell{padding-block:clamp(32px,5vw,56px);}
.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1fr) minmax(0,2.3fr);
  gap:clamp(24px,4vw,56px);
}
.footer-brand{
  min-width:0;
  padding-left:clamp(14px,2vw,20px);
  border-left:2px solid var(--cinnabar-500);
}
.footer-brand__name{font-size:20px;font-weight:700;letter-spacing:.14em;color:var(--text);}
.footer-brand__note{margin-top:12px;max-width:34ch;font-size:13.5px;line-height:1.9;color:var(--text-2);}
.footer-baseline{
  display:flex;
  align-items:flex-start;
  gap:8px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1.7;
  letter-spacing:.05em;
  color:var(--text-3);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,2.4vw,32px);
}
.footer-col{min-width:0;}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:8px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--text);
}
.footer-list{margin-top:12px;display:flex;flex-direction:column;gap:8px;}
.footer-link{
  display:inline-block;
  font-size:13.5px;
  color:var(--text-2);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{color:var(--text);border-bottom-color:var(--amber-400);transform:translateX(2px);}
.footer-link--cinnabar{color:var(--cinnabar-ink);}
.footer-link--cinnabar:hover{color:var(--cinnabar-ink);border-bottom-color:var(--cinnabar-500);}
.footer-link--cyan{color:var(--cyan-ink);}
.footer-link--cyan:hover{color:var(--cyan-ink);border-bottom-color:var(--cyan-spark-400);}
.footer-note{
  display:block;
  font-size:12.5px;
  line-height:1.7;
  color:var(--text-3);
  word-break:break-word;
}
.footer-col .btn{margin-top:14px;}
.footer-contact{
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  letter-spacing:.03em;
  color:var(--text-2);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
}
.footer-legal{color:var(--text-3);}

/* ---------- 10. 右下角常驻索引 ---------- */
.dock{
  position:fixed;
  right:clamp(12px,2vw,26px);
  bottom:clamp(12px,2vw,26px);
  z-index:90;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:10px;
  pointer-events:none;
}
.dock>*{pointer-events:auto;}
.dock__toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:1px solid var(--amber-400);
  border-radius:var(--radius);
  background:var(--bg-2);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  box-shadow:0 8px 20px rgba(0,0,0,.42);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.dock__toggle:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.5);}
.dock__toggle-num{color:var(--amber-ink);}
.dock__toggle-text{white-space:nowrap;}
.dock__panel{
  width:min(300px,86vw);
  padding:14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-2);
  box-shadow:var(--shadow);
  animation:dockIn .2s var(--ease);
}
.dock__panel[hidden]{display:none;}
@keyframes dockIn{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}
.dock__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--text-3);}
.dock__list{margin-top:10px;display:flex;flex-direction:column;gap:6px;}
.dock__link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:var(--bg);
  color:var(--text);
  font-size:13.5px;
  transition:border-color .18s var(--ease),transform .18s var(--ease),background-color .18s var(--ease);
}
.dock__link:hover{border-color:var(--amber-400);background:var(--bg-2);transform:translateY(-2px);}
.dock__num{font-family:var(--font-mono);font-size:11px;color:var(--text-3);}
.dock__label{flex:1;min-width:0;}
.dock__tag{
  padding:1px 6px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--text-3);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  white-space:nowrap;
}
.dock__tag--cinnabar{color:var(--cinnabar-ink);border-color:var(--cinnabar-500);}
.dock__tag--cyan{color:var(--cyan-ink);border-color:var(--cyan-spark-400);}
.dock__note{margin-top:10px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--text-3);}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1180px){
  .nav-actions .btn--ghost{display:none;}
  .site-nav__link{padding:9px 8px;font-size:13.5px;}
}

@media (max-width:1000px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    z-index:70;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:var(--bg-2);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    transition:max-height .24s var(--ease),visibility .24s linear;
  }
  .site-nav[data-open]{
    max-height:min(78vh,620px);
    overflow-y:auto;
    visibility:visible;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:8px 0;}
  .site-nav__item{border-bottom:1px solid var(--line-soft);}
  .site-nav__link{
    padding:14px 18px;
    font-size:15px;
    border-radius:0;
    transform:none;
  }
  .site-nav__link:hover,
  .site-nav__link[aria-current="page"]{transform:none;border-left:2px solid var(--dot);}
  .nav-actions{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    margin-left:0;
    padding:16px 18px 20px;
    border-top:1px solid var(--line);
  }
  .nav-actions .btn{width:100%;}
  .nav-actions .btn--ghost{display:inline-flex;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .grid-split{grid-template-columns:1fr;}
  .col-index{position:static;top:auto;}
  .footer-top{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:760px){
  .utility-bar__item--mail{display:none;}
  .utility-bar{font-size:11px;}
  .site-footer .shell{padding-bottom:96px;}
}

@media (max-width:560px){
  .utility-bar__item--tel{display:none;}
  .util-chip--lang{display:none;}
  .brand__sub{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .section-head__note{margin-left:0;}
  .dock{align-items:stretch;}
  .dock__toggle{justify-content:center;}
  .dock__panel{width:calc(100vw - 24px);}
}

/* ---------- 12. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .site-nav__link:hover,.btn:hover,.card:hover,.dock__link:hover,.dock__toggle:hover{transform:none;}
}