/* ==========================================================================
   YUNAPP 官方 / 共享样式表  /assets/site.css
   档案口吻 · 青黛蓝结构色 · 瓷白纸面 · 极细边界
   ========================================================================== */

:root{
  /* 结构色 */
  --blue:#16304F;
  --blue-deep:#0B1A2B;
  --blue-mid:#2F5E92;
  --blue-line:#1E3E63;
  --blue-soft:#E4EAF1;

  /* 纸面与边界 */
  --paper:#F7F5F0;
  --paper-2:#EDE8DE;
  --line:#C9C2B5;
  --line-strong:#A9A192;

  /* 文本 */
  --ink:#26241F;
  --ink-soft:#6A665C;

  /* 状态色 */
  --orange:#C75B26;
  --green:#2F7A6B;
  --red:#9B2C2C;

  /* 字体 */
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono","DejaVu Sans Mono",Menlo,monospace;

  /* 尺度 */
  --wrap:1280px;
  --gutter:clamp(18px,4vw,44px);
  --dur:180ms;
  --ease:linear;
}

/* --------------------------------------------------------------------------
   reset
   -------------------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html:focus-within{scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:900;line-height:1.1;letter-spacing:-.01em;color:var(--ink)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
dl,dt,dd,figure,blockquote{margin:0}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:0}

:focus-visible{outline:2px solid var(--blue-mid);outline-offset:2px}
.site-footer :focus-visible,
.site-nav :focus-visible,
.site-header__toolbar :focus-visible{outline-color:#8FB4DC}

/* --------------------------------------------------------------------------
   工具层
   -------------------------------------------------------------------------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.02em;
}
.muted{color:var(--ink-soft)}
.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;
}

.skip-link{
  position:absolute;left:var(--gutter);top:-72px;z-index:140;
  display:inline-flex;align-items:center;
  padding:10px 18px;
  background:var(--blue);color:var(--paper);
  border:1px solid var(--blue-deep);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:10px}

/* --------------------------------------------------------------------------
   header
   -------------------------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}

.site-header__toolbar{
  background:var(--blue-deep);
  border-bottom:1px solid var(--blue);
}
.site-header__toolbar-inner{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:clamp(12px,3vw,30px);
  min-height:32px;padding-block:6px;
}
.toolbar-meta{
  margin:0;
  font-size:12px;line-height:1.6;letter-spacing:.05em;
  color:#8FA5BC;
}
.toolbar-meta--end{margin-left:auto;color:#C4D2E0}

.scroll-progress{height:2px;background:var(--paper-2);overflow:hidden}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  background:var(--blue-mid);
  transform:scaleX(0);
  transform-origin:0 50%;
}

.site-header__bar{
  display:flex;align-items:center;
  gap:clamp(14px,3vw,32px);
  min-height:74px;
  padding-block:12px;
}

.brand-block{
  display:flex;align-items:center;
  gap:clamp(12px,2vw,24px);
  min-width:0;
}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  display:grid;place-items:center;
  width:40px;height:40px;
  background:var(--blue);color:var(--paper);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:background var(--dur) var(--ease);
}
.brand:hover .brand__mark{background:var(--blue-mid)}
.brand__stack{display:flex;flex-direction:column;gap:1px;line-height:1.2}
.brand__name{font-size:17px;font-weight:900;letter-spacing:.1em;color:var(--ink)}
.brand__sub{font-size:11px;letter-spacing:.14em;color:var(--ink-soft)}

.prefix-rail{display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap}
.prefix-rail__item{
  display:inline-flex;align-items:center;
  padding:5px 9px;
  border:1px solid var(--line);
  background:var(--paper);
  color:var(--blue);
  font-size:12px;letter-spacing:.08em;line-height:1.4;
  transition:background var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease);
}
.prefix-rail__item:hover{background:var(--blue);border-color:var(--blue);color:var(--paper)}
.prefix-rail--drawer{display:none}

.nav-toggle{
  display:none;
  align-items:center;gap:10px;
  margin-left:auto;
  padding:9px 14px;
  border:1px solid var(--line);
  color:var(--blue);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--blue);background:var(--paper-2)}
.nav-toggle__text{line-height:1}
.nav-toggle__bars{
  display:inline-flex;flex-direction:column;justify-content:space-between;
  width:16px;height:11px;flex:0 0 auto;
}
.nav-toggle__bars span{display:block;height:1.5px;background:currentColor}
.nav-toggle__bars span:nth-child(2){width:70%}

.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;flex-wrap:wrap;gap:2px}
.site-nav__item{position:relative}
.site-nav__link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 13px;
  font-size:14px;font-weight:700;letter-spacing:.02em;color:var(--ink);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;
  background:var(--blue);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--dur) var(--ease);
}
.site-nav__link:hover{color:var(--blue);background:var(--blue-soft)}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--blue)}

.site-nav__head,.nav-close{display:none}

/* --------------------------------------------------------------------------
   footer
   -------------------------------------------------------------------------- */
.site-footer{background:var(--paper)}

.site-footer__archive{
  background:var(--blue-deep);
  color:#C7D3E0;
  padding-block:clamp(44px,6vw,72px) clamp(34px,5vw,56px);
}
.site-footer__grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:clamp(24px,3vw,42px);
}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--blue-line);
  font-family:var(--font-mono);
  font-size:12px;font-weight:400;letter-spacing:.18em;
  color:#8FA5BC;
}
.footer-col__list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-flex;align-items:baseline;gap:9px;
  font-size:14.5px;line-height:1.6;color:#D4DEE9;
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{color:#FFFFFF}
.footer-link__key{font-size:12px;letter-spacing:.1em;color:#8FA5BC}
.footer-link:hover .footer-link__key{color:#C4D2E0}

.footer-contact{
  display:flex;flex-direction:column;gap:10px;
  margin-top:18px;padding-top:16px;
  border-top:1px solid var(--blue-line);
}
.footer-contact__row{display:flex;align-items:flex-start;gap:12px}
.footer-contact dt{
  flex:0 0 50px;
  padding-top:3px;
  font-size:11px;letter-spacing:.12em;color:#7E93A8;
}
.footer-contact dd{color:#D4DEE9;font-size:13.5px;line-height:1.7;word-break:break-word}
.footer-col__note{
  margin:16px 0 0;
  font-size:12px;letter-spacing:.06em;color:#8FA5BC;
}

.site-footer__seal{background:var(--blue);color:#BFCDDB}
.site-footer__seal-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 24px;
  padding-block:16px;
  border-top:1px solid var(--blue-line);
}
.seal-brand,.seal-icp{margin:0;font-size:12px;line-height:1.6;letter-spacing:.04em}
.seal-brand{color:#C4D2E0}
.seal-icp{color:#93A9C0}

/* --------------------------------------------------------------------------
   通用组件
   -------------------------------------------------------------------------- */
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;
  background:var(--blue);border:1px solid var(--blue);color:var(--paper);
  font-size:14.5px;font-weight:700;letter-spacing:.03em;
  transition:background var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease);
}
.btn:hover{background:var(--blue-mid);border-color:var(--blue-mid);color:#FFFFFF}
.btn--ghost{background:transparent;color:var(--blue)}
.btn--ghost:hover{background:var(--blue);border-color:var(--blue);color:var(--paper)}
.btn--ink{background:var(--ink);border-color:var(--ink)}
.btn--ink:hover{background:var(--blue-deep);border-color:var(--blue-deep)}
.btn__key{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;opacity:.72}
.btn[aria-disabled="true"]{opacity:.45;pointer-events:none}

/* 面包屑 */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;line-height:1.6;color:var(--ink-soft);
}
.breadcrumb a{color:var(--blue-mid);border-bottom:1px solid transparent}
.breadcrumb a:hover{border-bottom-color:var(--blue-mid)}
.breadcrumb [aria-current="page"]{color:var(--ink)}
.breadcrumb__sep{color:var(--line-strong)}

/* 正文容器 */
.prose{max-width:68ch}
.prose p{max-width:68ch;margin:0 0 1.1em}
.prose p:last-child{margin-bottom:0}
.prose h2{font-size:clamp(24px,3vw,32px);margin:2.2em 0 .6em}
.prose h3{font-size:clamp(19px,2vw,22px);margin:1.8em 0 .5em}
.prose ul{display:flex;flex-direction:column;gap:.5em;margin:0 0 1.1em}
.prose ul li{position:relative;padding-left:20px;max-width:68ch}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;
  width:10px;height:1px;background:var(--line-strong);
}

/* 栅格 */
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.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))}
.grid--offset{grid-template-columns:repeat(12,minmax(0,1fr))}
@media (min-width:1000px){
  .span-4{grid-column:span 4}
  .span-5{grid-column:span 5}
  .span-6{grid-column:span 6}
  .span-7{grid-column:span 7}
  .span-8{grid-column:span 8}
  .span-12{grid-column:span 12}
}
@media (max-width:999px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:639px){
  .grid--2,.grid--3,.grid--4,.grid--offset{grid-template-columns:minmax(0,1fr)}
}

/* 展览标签：编号 / 版本 / 生效时段 / 时间戳 */
.exhibit-label{
  display:flex;flex-wrap:wrap;
  border:1px solid var(--line);
  background:var(--paper);
}
.exhibit-label__field{
  flex:1 1 150px;min-width:0;
  padding:10px 14px;
  border-right:1px solid var(--line);
}
.exhibit-label__field:last-child{border-right:0}
.exhibit-label__key{
  display:block;margin-bottom:3px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-soft);
}
.exhibit-label__val{
  display:block;
  font-family:var(--font-mono);
  font-size:14px;line-height:1.5;color:var(--ink);
}
@media (max-width:639px){
  .exhibit-label__field{border-right:0;border-bottom:1px solid var(--line)}
  .exhibit-label__field:last-child{border-bottom:0}
}

/* 图片容器基础规则（页面阶段放图或保留占位） */
.media-frame{
  position:relative;
  border:1px solid var(--line);
  background:var(--paper-2);
  overflow:hidden;
}
.media-frame__inner{
  position:relative;width:100%;aspect-ratio:4/3;
  background-image:repeating-linear-gradient(
    135deg,
    rgba(22,48,79,.07) 0 1px,
    transparent 1px 12px
  );
}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;bottom:0;
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;
  background:var(--blue);color:var(--paper);
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.08em;
}
.media-frame--wide .media-frame__inner{aspect-ratio:16/9}
.media-frame--tall .media-frame__inner{aspect-ratio:3/4}
.media-frame--square .media-frame__inner{aspect-ratio:1/1}
.media-frame--flush{border:0}

/* 状态标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  background:var(--paper);
  color:var(--ink-soft);
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;line-height:1.6;
}
.tag__dot{display:block;width:6px;height:6px;background:currentColor}
.tag--verify{color:var(--green);border-color:var(--green);background:rgba(47,122,107,.08)}
.tag--pending{color:var(--orange);border-color:var(--orange);background:rgba(199,91,38,.08)}
.tag--fail{color:var(--red);border-color:var(--red);background:rgba(155,44,44,.08)}

/* 折叠面板 */
.panel{border:1px solid var(--line);background:var(--paper)}
.panel + .panel{margin-top:-1px}
.panel__head{
  display:flex;align-items:center;gap:12px;width:100%;
  padding:14px 16px;
  background:var(--paper-2);
  border-bottom:1px solid transparent;
  text-align:left;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.panel__head:hover{background:var(--blue-soft)}
.panel__head[aria-expanded="true"]{background:var(--paper);border-bottom-color:var(--line)}
.panel__key{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--blue-mid);
}
.panel__title{flex:1 1 auto;font-size:15.5px;font-weight:700;line-height:1.5}
.panel__mark{position:relative;flex:0 0 auto;width:12px;height:12px}
.panel__mark::before,
.panel__mark::after{content:"";position:absolute;background:var(--ink-soft)}
.panel__mark::before{left:0;top:50%;width:100%;height:1.5px;margin-top:-.75px}
.panel__mark::after{top:0;left:50%;height:100%;width:1.5px;margin-left:-.75px;transition:transform var(--dur) var(--ease)}
.panel__head[aria-expanded="true"] .panel__mark::after{transform:scaleY(0)}
.panel__body{padding:16px;border-top:1px solid var(--line)}
.panel__body[hidden]{display:none}

/* 章节编号标题 */
.section-label{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  margin-bottom:clamp(20px,3vw,34px);
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.section-label__num{
  font-family:var(--font-mono);
  font-size:clamp(20px,2.4vw,26px);line-height:1;
  color:var(--blue-mid);letter-spacing:.02em;
}
.section-label__text{font-size:14px;font-weight:700;letter-spacing:.1em;color:var(--ink)}
.section-label__meta{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.04em;color:var(--ink-soft);
}

/* 纵向编号索引带 */
.num-rail{
  position:fixed;right:18px;top:50%;transform:translateY(-50%);
  z-index:40;
  display:flex;flex-direction:column;gap:10px;
}
.num-rail__item{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--line-strong);
  transition:color var(--dur) var(--ease);
}
.num-rail__item::before{
  content:"";width:14px;height:1px;background:currentColor;
  transition:width var(--dur) var(--ease);
}
.num-rail__item:hover{color:var(--blue-mid)}
.num-rail__item[data-active]{color:var(--blue)}
.num-rail__item[data-active]::before{width:26px}
@media (max-width:1279px){.num-rail{display:none}}

/* --------------------------------------------------------------------------
   移动端 / 平板
   -------------------------------------------------------------------------- */
@media (max-width:999px){
  .site-header__bar{flex-wrap:nowrap;align-items:center;gap:12px;min-height:64px;padding-block:10px}
  .brand-block{
    flex-wrap:nowrap;overflow-x:auto;
    scrollbar-width:none;-ms-overflow-style:none;
    padding-bottom:2px;
  }
  .brand-block::-webkit-scrollbar{display:none}
  .prefix-rail{flex-wrap:nowrap}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;inset:0 0 0 auto;z-index:80;
    width:min(400px,86vw);
    padding:20px 22px 44px;
    background:var(--blue-deep);color:var(--paper);
    overflow-y:auto;
    transform:translateX(101%);
    visibility:hidden;
    box-shadow:-24px 0 48px rgba(11,26,43,.28);
    transition:transform 300ms ease,visibility 300ms linear;
  }
  .site-nav[data-open]{transform:none;visibility:visible}

  .site-nav__head{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    margin-bottom:20px;padding-bottom:14px;
    border-bottom:1px solid var(--blue-line);
  }
  .site-nav__head-label{font-size:12px;letter-spacing:.16em;color:#8FA5BC}

  .nav-close{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;flex:0 0 auto;
    border:1px solid #2C4E75;color:#CFDCE9;
    transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
  }
  .nav-close:hover{background:var(--blue-mid);border-color:var(--blue-mid);color:#FFFFFF}
  .nav-close__x{position:relative;display:block;width:14px;height:14px}
  .nav-close__x::before,
  .nav-close__x::after{
    content:"";position:absolute;left:0;top:50%;width:100%;height:1.5px;
    background:currentColor;
  }
  .nav-close__x::before{transform:rotate(45deg)}
  .nav-close__x::after{transform:rotate(-45deg)}

  .prefix-rail--drawer{display:inline-flex;flex-wrap:wrap;gap:6px;margin-bottom:22px}
  .prefix-rail--drawer .prefix-rail__item{
    background:transparent;border-color:#2C4E75;color:#C4D2E0;
  }
  .prefix-rail--drawer .prefix-rail__item:hover{
    background:var(--blue-mid);border-color:var(--blue-mid);color:#FFFFFF;
  }

  .site-nav__list{
    flex-direction:column;gap:0;flex-wrap:nowrap;
    border-top:1px solid var(--blue-line);
  }
  .site-nav__item{border-bottom:1px solid var(--blue-line)}
  .site-nav__link{
    display:flex;align-items:center;justify-content:space-between;
    width:100%;padding:15px 2px;
    font-size:16px;color:#E6EDF4;
  }
  .site-nav__link::after{display:none}
  .site-nav__link:hover{background:rgba(47,94,146,.32);color:#FFFFFF}
  .site-nav__link[aria-current="page"]{background:rgba(47,94,146,.42);color:#FFFFFF}
}

@media (max-width:639px){
  body{font-size:16px}
  .toolbar-meta{font-size:11.5px}
  .toolbar-meta--end{margin-left:0}
  .brand__sub{display:none}
  .brand__mark{width:34px;height:34px}
  .brand__name{font-size:15.5px}
  .site-footer__grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-contact dt{flex:0 0 44px}
}

/* --------------------------------------------------------------------------
   动效降级
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}