/* =====================================================================
   777棋牌老 · 共享样式表  /assets/site.css
   墨绿基座 + 抽屉深绿 + 暖金主线 + 霓虹青检索态 + 玫红勘误态
   ===================================================================== */

/* 1. reset 与变量 --------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,fieldset{margin:0}
img,svg{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}
table{border-collapse:collapse}

:root{
  --ink:#0A1C17;
  --drawer:#102A22;
  --drawer-2:#14332A;
  --gold:#C9A227;
  --gold-hi:#E9CD74;
  --cyan:#35E0D2;
  --rose:#E2517C;
  --paper:#D9DFDA;
  --index:#86938C;
  --white:#F3F6F2;
  --glitch:#6A4A86;

  --font-display:"Noto Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --s1:8px; --s2:16px; --s3:24px; --s4:40px; --s5:64px; --s6:96px;

  --line:1px solid rgba(201,162,39,.28);
  --line-soft:1px solid rgba(134,147,140,.24);
  --maxw:1280px;
  --readw:720px;
  --header-h:88px;
  --header-h-solid:64px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* 2. 基础排版 ------------------------------------------------------- */
body{
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(201,162,39,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,162,39,.045) 1px,transparent 1px),
    radial-gradient(circle at 16% -8%,rgba(53,224,210,.07),transparent 55%),
    radial-gradient(circle at 88% 10%,rgba(106,74,134,.16),transparent 52%);
  background-size:96px 96px,96px 96px,100% 100%,100% 100%;
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}
body.nav-locked{overflow:hidden}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.28;
  color:var(--white);
  margin-bottom:var(--s2);
}
h1{font-size:clamp(30px,4.2vw,52px);letter-spacing:0}
h2{font-size:clamp(23px,2.6vw,32px);font-weight:600}
h3{font-size:clamp(18px,1.6vw,22px);font-weight:600}
h4{font-size:17px;font-weight:600}

p{max-width:38em}
a{color:var(--cyan)}
strong{color:var(--white);font-weight:600}
code,kbd,samp{font-family:var(--font-mono);font-size:.94em;color:var(--gold-hi)}

:focus-visible{
  outline:2px solid var(--gold-hi);
  outline-offset:2px;
  border-radius:0;
}

/* 3. 跳转链接 ------------------------------------------------------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-80px;
  z-index:120;
  display:inline-block;
  padding:10px 18px;
  background:var(--gold);
  color:var(--ink);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  border:1px solid var(--gold-hi);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* 4. 顶部导航 ------------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-solid{
  background:rgba(16,42,34,.97);
  border-bottom-color:rgba(201,162,39,.45);
}
.header-inner{
  position:relative;
  z-index:2;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--s3);
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:var(--s3);
  transition:height .2s var(--ease);
}
.site-header.is-solid .header-inner{height:var(--header-h-solid)}
.header-ruler{
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,rgba(201,162,39,.6),rgba(201,162,39,.12) 42%,rgba(53,224,210,.35));
  transition:opacity .2s var(--ease);
}
.site-header.is-solid .header-ruler{opacity:0}

/* 品牌字标 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--white);
  flex:0 0 auto;
}
.brand-mark{
  width:40px;height:40px;
  display:grid;
  place-items:center;
  background:linear-gradient(155deg,var(--gold-hi),var(--gold) 55%,#8A6D14);
  color:#0A1C17;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  border:1px solid var(--gold-hi);
}
.brand-text{display:block}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.25;
}
.brand-sub{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.24em;
  color:var(--index);
  line-height:1.4;
}
.brand:hover .brand-name{color:var(--gold-hi)}
.brand--footer .brand-mark{width:36px;height:36px;font-size:17px}
.brand--footer .brand-name{font-size:18px}

/* 栏目索引 */
.site-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:var(--s2);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-item{margin:0}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:6px;
  padding:8px 10px;
  color:var(--paper);
  font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-num{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--index);
  transition:color .18s var(--ease);
}
.nav-link:hover{color:var(--gold-hi);background:rgba(201,162,39,.1)}
.nav-link:hover .nav-num{color:var(--cyan)}
.nav-link[aria-current="page"]{
  color:var(--gold-hi);
  border-bottom-color:var(--gold-hi);
  background:rgba(201,162,39,.08);
}
.nav-link[aria-current="page"] .nav-num{color:var(--cyan)}

.nav-aside{display:none}
.nav-aside-link{width:100%;justify-content:center}
.nav-aside-issue{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--index);
}

/* 右侧工具 */
.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.header-search{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  font-size:13px;
  color:var(--paper);
  text-decoration:none;
  border:1px solid rgba(53,224,210,.42);
  background:rgba(53,224,210,.06);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.header-search:hover{color:var(--cyan);border-color:var(--cyan);background:rgba(53,224,210,.14)}
.header-search-icon{
  position:relative;
  width:10px;height:10px;
  border:1px solid currentColor;
  border-radius:50%;
  display:inline-block;
}
.header-search-icon::after{
  content:"";
  position:absolute;
  right:-4px;bottom:-3px;
  width:6px;height:1px;
  background:currentColor;
  transform:rotate(45deg);
}
.issue-chip{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--gold-hi);
  border:1px solid rgba(201,162,39,.5);
  background:rgba(201,162,39,.08);
  padding:5px 9px;
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  position:relative;
  z-index:70;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  background:rgba(16,42,34,.9);
  border:1px solid rgba(201,162,39,.5);
  color:var(--gold-hi);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-hi);color:var(--white)}
.nav-toggle-bars{
  position:relative;
  width:16px;height:1px;
  background:currentColor;
  display:inline-block;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:1px;
  background:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle-text{line-height:1}

/* 5. 内容容器与网格 ------------------------------------------------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--s3);
}
.shell--read{max-width:calc(var(--readw) + var(--s3) * 2)}
.section{padding:var(--s5) 0}
.section--tight{padding:var(--s4) 0}
.measure{max-width:var(--readw)}
.stack>*+*{margin-top:var(--s3)}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--s3);
}
.col-1{grid-column:span 1}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-10{grid-column:span 10}
.col-11{grid-column:span 11}
.col-12{grid-column:span 12}

/* 6. 章节标题组与装饰 ----------------------------------------------- */
.section-head{
  position:relative;
  margin-bottom:var(--s3);
}
.section-head::after{
  content:"";
  display:block;
  height:1px;
  margin-top:var(--s2);
  background:linear-gradient(90deg,var(--gold),rgba(201,162,39,0));
}
.section-num{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.3em;
  color:var(--gold);
  margin-bottom:var(--s1);
}
.section-lede{
  max-width:var(--readw);
  font-size:15px;
  color:var(--index);
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--cyan);
  margin-bottom:var(--s1);
}
.lede{
  font-size:17px;
  line-height:1.9;
  color:var(--paper);
  max-width:var(--readw);
}
.chapter-num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(40px,7vw,84px);
  line-height:1;
  letter-spacing:-.02em;
  color:rgba(201,162,39,.32);
}
.rule{
  height:1px;
  border:0;
  margin:var(--s4) 0;
  background:linear-gradient(90deg,rgba(201,162,39,.6),rgba(201,162,39,0));
}
.rule--soft{
  background:rgba(134,147,140,.3);
  background-image:none;
}

/* 7. 按钮 ----------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid var(--gold);
  background:transparent;
  color:var(--gold-hi);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:500;
  letter-spacing:.04em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{background:rgba(201,162,39,.14);border-color:var(--gold-hi);color:var(--white)}
.btn--solid{background:var(--gold);border-color:var(--gold);color:#0A1C17}
.btn--solid:hover{background:var(--gold-hi);border-color:var(--gold-hi);color:#0A1C17}
.btn--quiet{border-color:rgba(134,147,140,.45);color:var(--paper)}
.btn--quiet:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(53,224,210,.08)}
.btn--sm{padding:6px 12px;font-size:13px}

/* 8. 卡片 ----------------------------------------------------------- */
.card{
  position:relative;
  padding:var(--s3);
  background:var(--drawer);
  border:1px solid rgba(201,162,39,.22);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:var(--gold-hi);
  box-shadow:0 0 0 1px rgba(233,205,116,.22);
}
.card--offset{margin-top:32px}
.card-num{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--gold);
  margin-bottom:var(--s1);
}
.card-title{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:600;
  color:var(--white);
  margin-bottom:6px;
}
.card-meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--index);
}
.card-body{
  margin-top:var(--s2);
  font-size:15px;
  color:var(--paper);
}

/* 9. 档案抽屉 ------------------------------------------------------- */
.drawer{
  border:1px solid rgba(201,162,39,.26);
  background:linear-gradient(180deg,var(--drawer),#0C231C);
  transition:border-color .2s var(--ease);
}
.drawer+.drawer{margin-top:-1px}
.drawer[data-open="true"]{border-color:rgba(233,205,116,.55)}
.drawer-head{
  width:100%;
  display:flex;
  align-items:center;
  gap:var(--s2);
  padding:16px var(--s3);
  background:none;
  border:0;
  text-align:left;
  cursor:pointer;
  transition:background-color .18s var(--ease);
}
.drawer-head:hover{background:rgba(201,162,39,.08)}
.drawer-head:hover .drawer-title{color:var(--gold-hi)}
.drawer-num{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--gold);
}
.drawer-title{
  flex:1 1 auto;
  font-family:var(--font-display);
  font-size:18px;
  font-weight:600;
  color:var(--white);
  transition:color .18s var(--ease);
}
.drawer-meta{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--index);
}
.drawer-caret{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--gold);
  transition:transform .22s var(--ease);
}
.drawer[data-open="true"] .drawer-caret{transform:rotate(90deg)}
.drawer-body{
  max-height:0;
  overflow:hidden;
  opacity:0;
  transition:max-height .26s var(--ease),opacity .26s var(--ease);
}
.drawer[data-open="true"] .drawer-body{
  max-height:var(--drawer-max,640px);
  opacity:1;
}
.drawer-body-inner{
  padding:var(--s2) var(--s3) var(--s3);
  border-top:1px solid rgba(134,147,140,.22);
}
.drawer-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.drawer-list li{
  display:flex;
  gap:12px;
  align-items:baseline;
  font-size:15px;
  color:var(--paper);
}
.drawer-list .idx{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--gold);
  flex:0 0 auto;
}

/* 10. 对照表 -------------------------------------------------------- */
.doc-table{
  width:100%;
  background:var(--drawer);
  font-size:14px;
}
.doc-table caption{
  caption-side:top;
  text-align:left;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--gold);
  padding-bottom:10px;
}
.doc-table th,
.doc-table td{
  border:1px solid rgba(134,147,140,.22);
  padding:10px 14px;
  text-align:left;
  vertical-align:top;
  line-height:1.7;
}
.doc-table thead th{
  background:rgba(201,162,39,.1);
  color:var(--gold-hi);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.08em;
}
.doc-table tbody tr{transition:background-color .16s var(--ease)}
.doc-table tbody tr:hover{background:rgba(53,224,210,.07)}
.doc-table tr.is-diff{background:rgba(226,81,124,.1)}
.doc-table tr.is-diff td:first-child{box-shadow:inset 3px 0 0 var(--rose)}
.cell-mono{font-family:var(--font-mono);font-size:13px;letter-spacing:.03em}

/* 11. 标签 ---------------------------------------------------------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--paper);
  border:1px solid rgba(134,147,140,.4);
  background:rgba(16,42,34,.85);
}
.tag--gold{border-color:rgba(201,162,39,.55);color:var(--gold-hi);background:rgba(201,162,39,.09)}
.tag--cyan{border-color:rgba(53,224,210,.55);color:var(--cyan);background:rgba(53,224,210,.09)}
.tag--rose{border-color:rgba(226,81,124,.55);color:var(--rose);background:rgba(226,81,124,.1)}
.hit{background:rgba(53,224,210,.24);color:var(--white);padding:0 2px}

/* 12. 面包屑与侧栏索引 ---------------------------------------------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--index);
  margin-bottom:var(--s3);
}
.breadcrumb a{
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px solid rgba(53,224,210,.4);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb .sep{color:rgba(134,147,140,.6)}
.breadcrumb [aria-current="page"]{color:var(--gold-hi);border-bottom:0}

.index-rail{
  position:sticky;
  top:calc(var(--header-h-solid) + 24px);
  list-style:none;
  margin:0;
  padding:0;
  border-left:1px solid rgba(201,162,39,.28);
}
.index-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin-left:-1px;
  padding:8px 12px;
  font-size:14px;
  color:var(--index);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.index-link .idx{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--gold);
}
.index-link:hover{color:var(--paper);background:rgba(201,162,39,.07)}
.index-link.is-current{
  color:var(--gold-hi);
  font-weight:500;
  border-left-color:var(--gold-hi);
  background:rgba(201,162,39,.09);
}
.index-link.is-current .idx{color:var(--cyan)}

/* 13. 本地检索与筛选 ------------------------------------------------ */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:var(--s2);
  padding:var(--s2);
  border:1px solid rgba(53,224,210,.32);
  background:rgba(53,224,210,.05);
}
.filter-input{
  flex:1 1 240px;
  min-width:0;
  padding:10px 12px;
  background:var(--ink);
  border:1px solid rgba(53,224,210,.45);
  color:var(--white);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.6;
}
.filter-input::placeholder{color:var(--index)}
.filter-input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 2px rgba(53,224,210,.3)}
.filter-count{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--cyan);
}
.filter-empty{
  display:none;
  margin-top:var(--s2);
  padding:var(--s3);
  border:1px dashed rgba(226,81,124,.55);
  background:rgba(106,74,134,.14);
  color:var(--rose);
  font-size:14px;
}
.filter-empty.is-on{display:block}
.is-filtered-out{display:none !important}

/* 14. 提示块与元信息 ------------------------------------------------ */
.note-block{
  padding:var(--s2) var(--s3);
  border-left:2px solid var(--cyan);
  background:rgba(53,224,210,.06);
  font-size:15px;
}
.note-block--rose{
  border-left-color:var(--rose);
  background:rgba(226,81,124,.09);
}
.meta-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:var(--s1);
}
.meta-list li{
  display:flex;
  gap:var(--s2);
  font-size:14px;
  align-items:baseline;
}
.meta-key{
  flex:0 0 auto;
  min-width:96px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gold);
}

/* 15. 图片容器基础规则（页面阶段放图用） ---------------------------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:linear-gradient(180deg,var(--drawer),#0B2019);
  border:1px solid rgba(201,162,39,.26);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(.72) contrast(1.05);
  transition:filter .2s var(--ease),transform .28s var(--ease);
}
.media-frame:hover img{filter:saturate(.9) contrast(1.08)}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(10,28,23,.12),rgba(10,28,23,.66));
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--scan::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(53,224,210,.09) 0 1px,transparent 1px 4px);
  opacity:.7;
}
.media-frame--annotated::before{
  content:"";
  position:absolute;
  inset:10px;
  z-index:2;
  pointer-events:none;
  border:1px solid rgba(201,162,39,.5);
  clip-path:polygon(0 0,26px 0,26px 1px,1px 1px,1px 26px,0 26px,0 0,100% 0,100% 26px,calc(100% - 1px) 26px,calc(100% - 1px) 1px,calc(100% - 26px) 1px,calc(100% - 26px) 0,100% 0,100% 100%,calc(100% - 26px) 100%,calc(100% - 26px) calc(100% - 1px),calc(100% - 1px) calc(100% - 1px),calc(100% - 1px) calc(100% - 26px),100% calc(100% - 26px),100% 100%,0 100%,0 calc(100% - 26px),1px calc(100% - 26px),1px calc(100% - 1px),26px calc(100% - 1px),26px 100%,0 100%);
}
.media-placeholder{
  position:absolute;
  inset:0;
  z-index:3;
  display:grid;
  place-items:center;
  padding:var(--s3);
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:rgba(134,147,140,.85);
}
.media-caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--index);
}

/* 16. 页脚 ---------------------------------------------------------- */
.site-footer{
  margin-top:var(--s6);
  background:var(--ink);
  border-top:1px solid rgba(201,162,39,.55);
}
.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:var(--s5) var(--s3) var(--s3);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr));
  gap:var(--s4);
  padding-bottom:var(--s4);
  border-bottom:1px solid rgba(134,147,140,.22);
}
.footer-brand{display:block}
.footer-note{
  margin-top:var(--s2);
  max-width:34em;
  font-size:13px;
  line-height:1.9;
  color:var(--index);
}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--gold);
  margin-bottom:var(--s2);
}
.footer-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:8px;
}
.footer-list--tight{gap:6px}
.footer-list a{
  font-size:14px;
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--gold-hi);border-bottom-color:var(--gold)}
.footer-plain{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--index);
}
.footer-mid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--s4);
  padding:var(--s4) 0;
  border-bottom:1px solid rgba(134,147,140,.22);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:var(--s2) var(--s3);
  padding-top:var(--s3);
  border-top:1px solid rgba(201,162,39,.3);
}
.footer-sig{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper);
}
.footer-contact{
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
  list-style:none;
  margin:0;
  padding:0;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:var(--s3);
  align-items:center;
}
.footer-legal a{
  font-size:13px;
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px solid rgba(134,147,140,.5);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-legal a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* 17. 进度条与返回顶部 ---------------------------------------------- */
.scroll-progress{
  position:fixed;
  top:0;left:0;
  z-index:80;
  width:0;
  height:2px;
  pointer-events:none;
  background:linear-gradient(90deg,var(--gold),var(--cyan));
}
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:70;
  width:46px;height:46px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--gold);
  background:rgba(10,28,23,.92);
  color:var(--gold-hi);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transition:opacity .2s var(--ease),visibility .2s var(--ease),border-color .18s var(--ease);
}
.to-top.is-on{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--gold-hi);color:var(--white)}

/* 18. 响应式 -------------------------------------------------------- */
@media (max-width:1200px){
  .nav-link{padding:8px;font-size:13px}
  .header-inner{gap:var(--s2)}
}
@media (max-width:1023px){
  .header-search{display:none}
}
@media (max-width:960px){
  :root{--header-h:72px;--header-h-solid:60px}
  .nav-toggle{display:inline-flex}
  .issue-chip{display:none}
  .site-nav{
    position:fixed;
    inset:0;
    z-index:65;
    margin:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:calc(var(--header-h) + 24px) var(--s3) var(--s4);
    background-color:rgba(10,28,23,.99);
    background-image:
      linear-gradient(rgba(201,162,39,.05) 1px,transparent 1px),
      linear-gradient(90deg,rgba(201,162,39,.05) 1px,transparent 1px),
      linear-gradient(180deg,rgba(10,28,23,.99),rgba(16,42,34,.99));
    background-size:64px 64px,64px 64px,100% 100%;
    overflow-y:auto;
    transform:translateX(100%);
    opacity:0;
    visibility:hidden;
    transition:transform .26s var(--ease),opacity .2s var(--ease),visibility .26s var(--ease);
  }
  .site-nav[data-open="true"]{
    transform:translateX(0);
    opacity:1;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
  }
  .nav-item{border-bottom:1px solid rgba(201,162,39,.18)}
  .nav-link{
    justify-content:flex-start;
    width:100%;
    padding:15px 4px;
    font-family:var(--font-display);
    font-size:20px;
    letter-spacing:.04em;
  }
  .nav-num{width:30px;font-size:12px;color:var(--gold)}
  .nav-aside{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    margin-top:var(--s3);
  }
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-1,.col-2,.col-3,.col-4,.col-5,.col-6,
  .col-7,.col-8,.col-9,.col-10,.col-11,.col-12{grid-column:span 6}
  .col-3-m{grid-column:span 3}
  .card--offset{margin-top:0}
  .footer-top{grid-template-columns:1fr 1fr;gap:var(--s3)}
  .footer-brand{grid-column:1 / -1}
  .footer-mid{grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--s3)}
  .index-rail{position:static;top:auto}
}
@media (max-width:640px){
  body{font-size:15.5px;background-size:64px 64px,64px 64px,100% 100%,100% 100%}
  .shell{padding:0 var(--s2)}
  .section{padding:var(--s4) 0}
  .header-inner{padding:0 var(--s2)}
  .brand-sub{display:none}
  .footer-inner{padding:var(--s4) var(--s2) var(--s3)}
  .footer-top,.footer-mid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .filter-input{flex:1 1 100%}
  .doc-table{font-size:13px}
  .doc-table th,.doc-table td{padding:8px 10px}
  .to-top{right:14px;bottom:14px}
}

/* 19. 减少动态效果 -------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .card:hover{transform:none}
  .media-frame:hover img{transform:none}
  .site-nav{transition:none}
}