/* ==========================================================================
   齐发CN中文站 · 共享样式 /assets/site.css
   视觉基线：夜间数据档案室 —— 墨蓝底、层板档案盒、信号灯、印刷描边
   ========================================================================== */

/* --- 1. 设计变量 --------------------------------------------------------- */
:root{
  --c-ink:#0E1B33;
  --c-plate:#16253F;
  --c-plate-2:#1D2E4C;
  --c-signal:#FF7A29;
  --c-signal-soft:#FFB27A;
  --c-celadon:#3FA98E;
  --c-archive:#F2EDE3;
  --c-paper-line:#C9C3B6;
  --c-text:#E6E9EF;
  --c-text-dark:#1E222A;
  --c-muted:#8A93A6;
  --c-line:rgba(230,233,239,.13);
  --c-line-2:rgba(230,233,239,.26);
  --c-muted-dark:#63605A;

  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-head);
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell:1320px;
  --gutter:clamp(16px,4vw,40px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 22px 48px -30px rgba(0,0,0,.9);
  --header-h:76px;
}

/* --- 2. Reset ------------------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 20px)}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--c-ink);
  color:var(--c-text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(230,233,239,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(230,233,239,.028) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(120% 80% at 78% 4%,#000 0%,transparent 82%);
  mask-image:radial-gradient(120% 80% at 78% 4%,#000 0%,transparent 82%);
}
main{position:relative;z-index:1;display:block}
img,svg,video{max-width:100%;display:block}
ul,ol{list-style:none;margin:0;padding:0}
figure,blockquote{margin:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
p{margin:0}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font-head);font-weight:700;line-height:1.32;letter-spacing:.01em}
h1{font-size:clamp(28px,4.4vw,40px)}
h2{font-size:28px}
h3{font-size:20px}
hr{border:0;height:1px;background:var(--c-line);margin:32px 0}
:focus-visible{outline:2px solid var(--c-signal);outline-offset:3px;border-radius:var(--radius)}
[data-section],section[id],article[id],div[id]{scroll-margin-top:calc(var(--header-h) + 24px)}

/* --- 3. 排版与通用容器 ---------------------------------------------------- */
.mono{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
}
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.shell--narrow{max-width:980px}
.section{padding:64px 0}
.section--tight{padding:36px 0}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--c-muted);
}
.section-label::before{content:"";width:24px;height:2px;background:var(--c-signal)}
.section-title{font-size:clamp(22px,2.6vw,28px);font-weight:700}
.lead{font-size:17px;line-height:1.85;color:var(--c-text)}
.prose{max-width:40em}
.prose p{margin-bottom:18px;color:var(--c-text)}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{margin:0 0 18px;display:grid;gap:8px}
.prose li{position:relative;padding-left:18px;color:var(--c-text)}
.prose li::before{
  content:"";
  position:absolute;left:0;top:.75em;
  width:6px;height:6px;
  background:var(--c-celadon);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.divider{height:1px;background:var(--c-line);margin:40px 0}
.text-muted{color:var(--c-muted)}
.text-signal{color:var(--c-signal-soft)}
.text-celadon{color:var(--c-celadon)}

/* --- 4. 基础栅格 ---------------------------------------------------------- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* --- 5. 按钮 ------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-head);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
  transition:transform .18s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn--signal{background:var(--c-signal);color:#191008;border-color:var(--c-signal)}
.btn--signal:hover{background:var(--c-signal-soft);border-color:var(--c-signal-soft);transform:translateY(-2px)}
.btn--ghost{border-color:var(--c-line-2);color:var(--c-text);background:rgba(230,233,239,.03)}
.btn--ghost:hover{border-color:var(--c-celadon);color:var(--c-celadon);transform:translateY(-2px)}

/* --- 6. 标签 ------------------------------------------------------------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--c-line-2);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--c-muted);
  white-space:nowrap;
}
.tag--signal{border-color:rgba(255,122,41,.5);color:var(--c-signal-soft)}
.tag--celadon{border-color:rgba(63,169,142,.5);color:var(--c-celadon)}
.tag--paper{border-color:var(--c-paper-line);color:var(--c-muted-dark)}

/* --- 7. 档案盒卡片 -------------------------------------------------------- */
.archive-card{
  position:relative;
  padding:26px 26px 22px;
  background:var(--c-plate);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.archive-card--paper{
  background:var(--c-archive);
  border-color:var(--c-paper-line);
  color:var(--c-text-dark);
}
.archive-card--paper .card-index{color:var(--c-muted-dark)}
.archive-card--paper .card-divider{background:var(--c-paper-line)}
.archive-card--paper p{color:var(--c-text-dark)}
.card-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  margin-bottom:14px;
}
.card-index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-muted);
}
.card-title{font-size:20px;font-weight:600}
.card-divider{height:1px;background:var(--c-line);margin:18px 0 0}

/* --- 8. 可展开面板 -------------------------------------------------------- */
.panel{
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:rgba(22,37,63,.55);
  margin-bottom:12px;
  overflow:hidden;
}
.panel summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  cursor:pointer;
  font-family:var(--font-head);
  font-size:16px;
  font-weight:600;
  letter-spacing:.02em;
  list-style:none;
}
.panel summary::-webkit-details-marker{display:none}
.panel summary::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--c-signal);
}
.panel[open] summary::after{content:"−";color:var(--c-celadon)}
.panel-body{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--c-muted)}
.panel-body p{margin-bottom:12px}
.panel-body p:last-child{margin-bottom:0}

/* --- 9. 面包屑 ----------------------------------------------------------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-muted);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--c-line-2)}
.breadcrumb a{color:var(--c-muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--c-signal-soft)}
.breadcrumb [aria-current="page"]{color:var(--c-celadon)}

/* --- 10. 版本时间轴 / 索引 ---------------------------------------------- */
.toc{position:relative;padding-left:18px;border-left:1px solid var(--c-line)}
.toc-link{
  position:relative;
  display:block;
  padding:8px 0 8px 14px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--c-muted);
  transition:color .24s var(--ease);
}
.toc-link::before{
  content:"";
  position:absolute;
  left:-23px;
  top:50%;
  width:9px;height:9px;
  margin-top:-4.5px;
  border:1.5px solid var(--c-line-2);
  border-radius:50%;
  background:var(--c-ink);
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.toc-link:hover{color:var(--c-text)}
.toc-link.is-active{color:var(--c-celadon)}
.toc-link.is-active::before{
  border-color:var(--c-celadon);
  background:var(--c-celadon);
  box-shadow:0 0 0 4px rgba(63,169,142,.18);
}

/* --- 11. 图片容器基类 --------------------------------------------------- */
.figure{position:relative;margin:0}
.figure-media{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--c-plate);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure--wide .figure-media{aspect-ratio:21/9}
.figure--square .figure-media{aspect-ratio:1/1}
.figure--tall .figure-media{aspect-ratio:4/5}
.figure-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--c-muted);
}

/* --- 12. 跳转链接 ------------------------------------------------------- */
.skip-link{
  position:fixed;
  top:-100px;
  left:16px;
  z-index:120;
  padding:12px 20px;
  border-radius:var(--radius);
  background:var(--c-signal);
  color:#191008;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* --- 13. 页头 ----------------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,rgba(14,27,51,.99),rgba(14,27,51,.94));
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,var(--c-signal) 0 16%,var(--c-celadon) 16% 27%,transparent 27%);
  opacity:.75;
}
.reading-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  z-index:80;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--c-signal),var(--c-celadon));
}
.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  width:100%;
  max-width:var(--shell);
  min-height:var(--header-h);
  margin:0 auto;
  padding:0 var(--gutter);
}
.header-left{
  display:flex;
  align-items:center;
  gap:22px;
  min-width:0;
}

/* 品牌署名 */
.brand-lockup{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  position:relative;
  flex:0 0 34px;
  width:34px;
  height:34px;
  background:var(--c-celadon);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:3px;
  background:var(--c-ink);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:11px;
  background:var(--c-signal);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.brand-copy{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-name{
  font-family:var(--font-head);
  font-size:17px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--c-text);
  white-space:nowrap;
}
.brand-tagline{
  max-width:280px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--c-muted);
}

/* 旧版本资料对照入口 —— 橙色描边通道 */
.legacy-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  border:1px solid rgba(255,122,41,.45);
  border-radius:var(--radius);
  background:rgba(255,122,41,.08);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--c-signal-soft);
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.legacy-link:hover{border-color:var(--c-signal);background:rgba(255,122,41,.16);color:var(--c-signal)}
.legacy-link-dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--c-signal);
  animation:signal-pulse 2.4s ease-in-out infinite;
}
.legacy-link-code{color:var(--c-muted);font-size:11px}

/* 右置导航 */
.site-nav{display:flex;align-items:center;gap:26px}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:14.5px;
  letter-spacing:.04em;
  color:var(--c-text);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:4px;
  height:2px;
  background:var(--c-celadon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.nav-link:hover{color:var(--c-signal-soft)}
.nav-link:hover::after{transform:scaleX(1);background:var(--c-signal)}
.nav-link[aria-current="page"]{color:var(--c-celadon)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--c-celadon)}
.nav-foot{display:none}

/* 移动端开关 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--c-line-2);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--c-text);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-signal);color:var(--c-signal-soft)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:var(--c-signal);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:var(--c-signal);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

/* --- 14. 页脚 ----------------------------------------------------------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:80px;
  background:linear-gradient(180deg,var(--c-plate),var(--c-ink));
  border-top:1px solid var(--c-line-2);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(340px,42%);
  height:2px;
  background:linear-gradient(90deg,var(--c-signal),var(--c-celadon));
}
.footer-shell{
  display:grid;
  grid-template-columns:minmax(260px,1.1fr) 2fr;
  gap:56px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:56px var(--gutter) 40px;
}
.brand-lockup--footer .brand-mark{flex-basis:28px;width:28px;height:28px}
.brand-lockup--footer .brand-mark::after{inset:9px}
.footer-note{
  margin-top:16px;
  max-width:34em;
  font-size:14px;
  line-height:1.85;
  color:var(--c-muted);
}
.status-bar{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:20px;
  padding:10px 14px;
  border:1px solid rgba(63,169,142,.35);
  border-radius:var(--radius);
  background:rgba(63,169,142,.08);
  font-size:13px;
  line-height:1.6;
  color:var(--c-text);
}
.status-light{
  flex:0 0 auto;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--c-celadon);
  box-shadow:0 0 0 4px rgba(63,169,142,.16);
  animation:signal-pulse 2.4s ease-in-out infinite;
}
.status-region{
  margin-top:12px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-muted);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
}
.footer-col-title{
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px solid var(--c-line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--c-muted);
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{
  font-size:14px;
  color:var(--c-text);
  opacity:.86;
  transition:color .2s var(--ease),opacity .2s var(--ease);
}
.footer-col a:hover{color:var(--c-signal-soft);opacity:1}
.footer-meta{
  border-top:1px solid var(--c-line);
  background:rgba(0,0,0,.2);
}
.footer-meta-inner{
  display:flex;
  flex-wrap:wrap;
  gap:8px 28px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:20px var(--gutter) 28px;
}
.footer-line{
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--c-muted);
}
.footer-line--year{margin-left:auto}

/* 状态灯脉冲 */
@keyframes signal-pulse{
  0%,100%{opacity:1}
  50%{opacity:.34}
}

/* --- 15. 响应式 --------------------------------------------------------- */
@media (max-width:1180px){
  :root{--header-h:70px}
  .brand-tagline{max-width:200px}
  .legacy-link-code{display:none}
}
@media (max-width:1080px){
  .brand-tagline{display:none}
  .header-left{gap:14px}
  .legacy-link{font-size:12px;padding:6px 10px}
  .nav-link{padding:10px 9px;font-size:14px}
  .site-nav{gap:14px}
}
@media (max-width:960px){
  :root{--header-h:64px}
  .header-shell{min-height:var(--header-h);padding-top:10px;padding-bottom:10px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:10px var(--gutter) 22px;
    background:var(--c-plate);
    border-bottom:1px solid var(--c-line-2);
    box-shadow:0 28px 52px -26px rgba(0,0,0,.92);
  }
  .site-nav[data-open]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    display:block;
    padding:14px 4px;
    font-size:16px;
    border-bottom:1px solid var(--c-line);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--c-celadon);padding-left:16px}
  .nav-link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:1px;
    top:50%;
    width:7px;height:7px;
    margin-top:-3.5px;
    background:var(--c-celadon);
    clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  }
  .nav-foot{
    display:block;
    margin-top:16px;
    font-size:12px;
    letter-spacing:.12em;
    color:var(--c-muted);
  }
  .footer-shell{grid-template-columns:1fr;gap:36px;padding-top:44px}
}
@media (max-width:860px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .section{padding:48px 0}
  .section--tight{padding:28px 0}
}
@media (max-width:720px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-line--year{margin-left:0;width:100%}
  .figure-media{aspect-ratio:4/3}
  .figure--wide .figure-media{aspect-ratio:16/10}
}
@media (max-width:560px){
  .brand-name{font-size:15px;letter-spacing:.04em}
  .brand-mark{flex-basis:28px;width:28px;height:28px}
  .brand-mark::after{inset:9px}
  .legacy-link{padding:5px 8px;font-size:11.5px}
  .footer-cols{grid-template-columns:1fr}
  .archive-card{padding:20px 18px 18px}
  .btn{padding:12px 18px;font-size:14px}
}

/* --- 16. 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;
    scroll-behavior:auto !important;
  }
  .reading-progress{transition:none}
}