/* ==========================================================
   开元棋盘会馆 · 共享样式 /assets/site.css
   框架式导航 / 棋盘 Bento / 展签式注释 / 粗野主义块体
   ========================================================== */

:root{
  --ink-900:#0A231F;
  --ink-850:#0D2A24;
  --ink-700:#143C33;
  --ink-600:#0F2E28;
  --line-500:#1F5A4C;
  --gold-500:#C9A227;
  --gold-300:#E7CE7A;
  --cinnabar-500:#C4402C;
  --cinnabar-600:#A93524;
  --slate-400:#7E9490;
  --slate-200:#B9C6C2;
  --indigo-700:#1B2A4A;
  --paper-100:#F3EFE4;
  --paper-dim:rgba(243,239,228,.76);
  --paper-faint:rgba(243,239,228,.52);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --font-body:"Noto Sans SC","Source Han 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;

  --hard-1:4px 4px 0 rgba(0,0,0,.45);
  --hard-2:7px 7px 0 rgba(0,0,0,.52);
  --hard-gold:6px 6px 0 rgba(201,162,39,.26);
  --frame:2px solid var(--line-500);
  --shell-w:1360px;
  --pad-x:clamp(16px,4vw,44px);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:160px}
body,figure,blockquote,dl,dd,h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;letter-spacing:-.02em;line-height:1.2}

/* ---------- 棋盘底纹 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(90deg,rgba(31,90,76,.17) 0 1px,transparent 1px 72px),
    linear-gradient(0deg,rgba(31,90,76,.17) 0 1px,transparent 1px 72px);
  color:var(--paper-100);
  font-family:var(--font-body);
  font-size:clamp(16px,1vw,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
}

:focus-visible{outline:2px solid var(--gold-300);outline-offset:3px}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-90px;z-index:200;
  padding:12px 18px;background:var(--gold-500);color:var(--ink-900);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  border:2px solid var(--ink-900);box-shadow:var(--hard-1);
  transition:top .2s ease;
}
.skip-link:focus{top:14px}

/* ---------- 通用容器与文字 ---------- */
.container{width:min(var(--shell-w),100% - 2 * var(--pad-x));margin-inline:auto}
.section{padding:clamp(40px,6vw,88px) 0}
.section--paper{background:var(--paper-100);color:var(--ink-900)}
.section--paper .lead,.section--paper .annotation{color:rgba(10,35,31,.76)}
.section--paper .eyebrow{color:var(--cinnabar-500)}
.section--archived{
  background:var(--ink-850);color:var(--slate-200);
  border-top:2px dashed var(--slate-400);border-bottom:2px dashed var(--slate-400);
}
.section--archived h1,.section--archived h2,.section--archived h3{color:var(--slate-200)}

.eyebrow{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--gold-500);
  margin-bottom:14px;
}
.display{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.14;
  font-size:clamp(32px,6vw,84px)}
.section-title{font-size:clamp(24px,3.2vw,42px);margin-bottom:.5em}
.lead{font-size:clamp(16px,1.3vw,19px);color:var(--paper-dim);max-width:62ch}
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.annotation{
  font-family:var(--font-display);font-size:12px;line-height:1.7;
  letter-spacing:.09em;color:var(--slate-400);
}
.annotation--vertical{writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.24em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:2px solid var(--gold-500);background:transparent;
  color:var(--gold-300);font-family:var(--font-body);font-size:15px;font-weight:500;
  line-height:1.2;letter-spacing:.04em;text-align:center;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:var(--hard-2);background:var(--ink-700)}
.btn:active{transform:translate(0,0);box-shadow:none}
.btn--gold{background:var(--gold-500);border-color:var(--gold-500);color:var(--ink-900);box-shadow:var(--hard-1)}
.btn--gold:hover{background:var(--gold-300);border-color:var(--gold-300);color:var(--ink-900)}
.btn--cinnabar{background:var(--cinnabar-500);border-color:var(--cinnabar-500);color:var(--paper-100);box-shadow:var(--hard-1)}
.btn--cinnabar:hover{background:var(--cinnabar-600);border-color:var(--cinnabar-600);color:var(--paper-100)}
.btn--ghost{border-color:var(--slate-400);color:var(--slate-200)}
.btn--ghost:hover{background:transparent;border-color:var(--gold-500);color:var(--gold-300)}
.btn--sm{padding:8px 14px;font-size:13.5px;box-shadow:none}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-top:18px}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;gap:10px;
  font-family:var(--font-mono);font-size:12.5px;color:var(--slate-400);
}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line-500)}
.breadcrumb__link{color:var(--slate-200);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.breadcrumb__link:hover{color:var(--gold-300);border-bottom-color:var(--gold-500)}
.breadcrumb__current{color:var(--gold-500)}

/* ---------- 面板 / 状态块 ---------- */
.panel{
  position:relative;border:var(--frame);background:var(--ink-700);
  padding:clamp(18px,2.2vw,30px);box-shadow:var(--hard-1);
}
.panel__title{font-size:clamp(18px,1.8vw,23px);margin-bottom:10px;color:var(--paper-100)}
.panel--focus{border-color:var(--gold-500);box-shadow:var(--hard-gold)}
.panel--archived{
  background:transparent;border:2px dashed var(--slate-400);
  box-shadow:none;color:var(--slate-200);
}
.panel--archived .panel__title{color:var(--slate-200)}

/* ---------- 分类 chip ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 15px;border:2px solid var(--line-500);background:var(--ink-700);
  color:var(--slate-200);font-size:14px;line-height:1.2;cursor:pointer;
  transition:border-color .18s ease,color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.chip:hover{border-color:var(--gold-500);color:var(--gold-300)}
.chip[aria-pressed="true"]{
  border-color:var(--gold-500);color:var(--gold-300);
  background:var(--ink-600);box-shadow:3px 3px 0 rgba(0,0,0,.45);
}
.chip__num{font-family:var(--font-mono);font-size:12px;color:var(--gold-500)}

/* ---------- 数据刻度 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat{border:2px solid var(--line-500);background:var(--ink-600);padding:14px 16px}
.stat__value{display:block;font-family:var(--font-mono);font-size:clamp(20px,2.4vw,30px);color:var(--gold-300);line-height:1.2}
.stat__label{display:block;margin-top:4px;font-size:13px;color:var(--slate-400)}

/* ---------- 图像容器（页面阶段放图片 / SVG） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:2px solid var(--line-500);box-shadow:var(--hard-2);
  background:linear-gradient(155deg,var(--ink-700) 0%,var(--indigo-700) 100%);
}
.media-frame img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;padding:10px 14px;
  background:rgba(10,35,31,.88);border-top:1px solid var(--line-500);
  color:var(--slate-200);font-family:var(--font-mono);font-size:12px;
}

/* ---------- 网格 ---------- */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:clamp(14px,2vw,26px)}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:clamp(14px,2vw,26px)}
.stack > * + *{margin-top:clamp(14px,2vw,24px)}
.grid-bento{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,1.6vw,22px)}
.bento-cell{
  position:relative;border:var(--frame);background:var(--ink-700);
  padding:clamp(16px,2vw,28px);box-shadow:var(--hard-1);
}
.bento-cell--2x2{grid-column:span 2;grid-row:span 2}
.bento-cell--2x1{grid-column:span 2}
.bento-cell--1x2{grid-row:span 2}

/* ---------- 可展开内容组 ---------- */
.disclosure{border:var(--frame);background:var(--ink-700);box-shadow:var(--hard-1)}
.disclosure + .disclosure{margin-top:12px}
.disclosure__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:16px 20px;border:0;background:transparent;
  color:var(--paper-100);font-family:var(--font-display);font-size:17px;font-weight:700;
  text-align:left;cursor:pointer;transition:color .18s ease,background-color .18s ease;
}
.disclosure__trigger:hover{background:var(--ink-600);color:var(--gold-300)}
.disclosure__mark{
  flex:0 0 auto;width:14px;height:14px;position:relative;
  transition:transform .24s ease;
}
.disclosure__mark::before,.disclosure__mark::after{
  content:"";position:absolute;background:var(--gold-500);
}
.disclosure__mark::before{left:0;right:0;top:6px;height:2px}
.disclosure__mark::after{top:0;bottom:0;left:6px;width:2px}
.disclosure[data-open] .disclosure__mark{transform:rotate(135deg)}
.disclosure[data-open] .disclosure__trigger{color:var(--gold-300)}
.disclosure__panel{height:0;overflow:hidden;transition:height .32s ease}
.disclosure__inner{
  padding:4px 20px 20px;border-top:1px solid var(--line-500);
  color:var(--paper-dim);font-size:15.5px;
}

/* ---------- 状态点 ---------- */
.status-dot{
  display:inline-block;width:7px;height:7px;background:var(--slate-400);
  vertical-align:middle;
}
.status-dot[data-state="live"]{background:var(--gold-300);animation:dot-pulse 1.4s ease-out 2}
@keyframes dot-pulse{
  0%{box-shadow:0 0 0 0 rgba(231,206,122,.5)}
  100%{box-shadow:0 0 0 8px rgba(231,206,122,0)}
}

/* ---------- 落子式显现 ---------- */
.reveal{opacity:0;transform:translate3d(0,-10px,0);transition:opacity .42s ease,transform .42s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 滚动进度（位于页头金梁上） ---------- */
.progress-bar{
  position:fixed;left:0;right:0;top:0;height:4px;z-index:120;
  pointer-events:none;background:rgba(31,90,76,.6);
}
.progress-bar__fill{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--gold-500),var(--gold-300));
}

/* ==========================================================
   页头：框架式导航
   ========================================================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--ink-900);
  border-bottom:2px solid var(--gold-500);
  box-shadow:0 8px 0 rgba(0,0,0,.35);
}
.header-frame{width:min(var(--shell-w),100% - 2 * var(--pad-x));margin-inline:auto}
.header-topbar{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  padding:14px 0 12px;
  border-bottom:1px solid var(--line-500);
}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  position:relative;display:block;width:30px;height:30px;
  border:2px solid var(--gold-500);background:var(--ink-700);
}
.brand__stone{
  position:absolute;inset:6px;background:var(--cinnabar-500);
  transform:translate(2px,2px);
}
.brand__text{display:block;line-height:1.2}
.brand__name{
  display:block;font-family:var(--font-display);font-weight:900;
  font-size:clamp(19px,1.9vw,24px);letter-spacing:.02em;color:var(--paper-100);
}
.brand__sub{
  display:block;margin-top:3px;font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.14em;color:var(--slate-400);
}
.header-status{display:flex;align-items:center;gap:10px;flex:1 1 auto;flex-wrap:wrap}
.status-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 11px;border:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--slate-200);
}
.status-chip--gold{border-color:var(--gold-500);color:var(--gold-300)}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 14px;border:2px solid var(--line-500);background:var(--ink-700);
  color:var(--gold-300);font-family:var(--font-display);font-size:14px;
  letter-spacing:.05em;cursor:pointer;
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--gold-500);background:var(--ink-600)}
.nav-toggle__bars{display:inline-grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:var(--gold-500);transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

.site-nav{
  display:grid;grid-template-rows:0fr;overflow:hidden;
  transition:grid-template-rows .3s ease;
}
.site-nav[data-open]{grid-template-rows:1fr}
.nav-list{min-height:0;overflow:hidden}
.nav-item{border-bottom:1px solid var(--line-500)}
.nav-item:last-child{border-bottom:0}
.nav-link{
  position:relative;display:flex;align-items:baseline;gap:12px;
  padding:14px 18px 14px 20px;color:var(--paper-dim);
  font-family:var(--font-display);font-size:15.5px;letter-spacing:.04em;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20px;right:18px;bottom:7px;height:2px;
  background:var(--gold-300);transform:scaleX(0);transform-origin:left center;
  transition:transform .28s ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--gold-300);background:var(--ink-700)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-num{font-size:11.5px;color:var(--slate-400);letter-spacing:.1em}
.nav-link[aria-current="page"]{color:var(--gold-300);background:var(--ink-700)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:6px;top:50%;width:6px;height:6px;
  transform:translateY(-50%);background:var(--cinnabar-500);
}
.nav-link[aria-current="page"] .nav-num{color:var(--gold-500)}

/* ==========================================================
   页脚
   ========================================================== */
.site-footer{
  margin-top:clamp(48px,7vw,104px);
  border-top:2px solid var(--gold-500);
  background:var(--ink-850);color:var(--paper-dim);
}
.footer-band{
  height:18px;
  border-bottom:1px solid var(--line-500);
  background-color:var(--ink-900);
  background-image:
    repeating-linear-gradient(90deg,rgba(31,90,76,.85) 0 1px,transparent 1px 26px),
    repeating-linear-gradient(0deg,rgba(31,90,76,.45) 0 1px,transparent 1px 9px);
}
.footer-inner{
  width:min(var(--shell-w),100% - 2 * var(--pad-x));
  margin-inline:auto;
  padding:clamp(30px,4vw,56px) 0 clamp(18px,2.4vw,30px);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:clamp(20px,3vw,40px);
}
.footer-block{min-width:0}
.footer-brand{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(20px,2vw,26px);color:var(--gold-300);letter-spacing:.02em;
  margin-bottom:10px;
}
.footer-line{font-size:14.5px;color:var(--paper-dim);max-width:36ch}
.footer-title{
  font-family:var(--font-display);font-size:15px;font-weight:700;
  color:var(--paper-100);letter-spacing:.06em;
  padding-bottom:8px;margin-bottom:12px;
  border-bottom:1px dashed var(--line-500);
}
.footer-list{display:block}
.footer-item{display:flex;gap:10px;padding:5px 0;font-size:14.5px}
.footer-key{
  flex:0 0 5.4em;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.06em;color:var(--slate-400);padding-top:3px;
}
.footer-val{color:var(--paper-100);word-break:break-word}
.footer-list--nav .footer-link{
  display:inline-block;padding:3px 0;font-size:14.5px;color:var(--slate-200);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover,.footer-link:focus-visible{color:var(--gold-300);border-bottom-color:var(--gold-500)}
.footer-tip{
  margin-top:12px;padding-left:10px;border-left:2px solid var(--line-500);
  font-size:13px;line-height:1.7;color:var(--slate-400);
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 26px;margin-top:clamp(24px,3vw,42px);padding-top:18px;
  border-top:1px dashed var(--line-500);
  font-size:13px;color:var(--slate-400);
}
.footer-subnav{display:flex;flex-wrap:wrap;gap:20px}
.footer-subnav-link{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  color:var(--slate-200);padding-bottom:2px;border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-subnav-link:hover,.footer-subnav-link:focus-visible{color:var(--gold-300);border-bottom-color:var(--gold-500)}
.footer-icp{font-family:var(--font-mono);font-size:12px}
.footer-note{font-family:var(--font-mono);font-size:12px}

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width:1250px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}

@media (max-width:959px){
  .header-status{display:none}
  .header-actions .btn{display:none}
  html{scroll-padding-top:120px}
  .section-title{font-size:clamp(22px,5.6vw,34px)}
}

@media (min-width:960px){
  .site-nav{
    grid-template-rows:1fr;overflow:visible;
    border-top:1px solid var(--line-500);
  }
  .nav-list{display:flex;overflow:visible}
  .nav-item{flex:1 1 auto;border-bottom:0;border-right:1px solid var(--line-500)}
  .nav-item:last-child{border-right:0}
  .nav-link{padding:14px 18px;justify-content:flex-start;height:100%}
  .nav-toggle{display:none}
}

@media (max-width:860px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-block--brand{grid-column:1 / -1}
}

@media (max-width:720px){
  .grid-bento{grid-template-columns:repeat(2,1fr)}
  .bento-cell--2x2{grid-column:span 2;grid-row:auto}
  .bento-cell--2x1{grid-column:span 2}
  .bento-cell--1x2{grid-row:auto}
  .media-frame{box-shadow:4px 4px 0 rgba(0,0,0,.5)}
  .footer-grid{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

@media (max-width:480px){
  .brand__sub{display:none}
  .status-chip{padding:5px 9px;font-size:11px}
}

/* ==========================================================
   动效降级
   ========================================================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .btn:hover{transform:none;box-shadow:none}
  .nav-link::after{transition:none}
}