/* ============================================================
   安博地址赛场 · 共享样式 /assets/site.css
   夜空深蓝底 + 蓝图网格 + 经幡五色状态语义
   ============================================================ */

:root{
  --blue-night:#0A1220;
  --panel:#121C30;
  --line:#22304A;
  --paper:#F4F7FA;
  --paper-line:#DCE3EC;
  --white:#FFFFFF;
  --flag-blue:#2E9BE6;
  --flag-red:#E0453C;
  --flag-green:#2FB271;
  --flag-yellow:#F2B733;
  --cyan:#21D4C2;
  --muted:#8A93A6;
  --ink:#0A1220;
  --ink-soft:#3A4658;
  --on-night:#C9D3E4;
  --on-night-soft:#8A93A6;

  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1280px;
  --gutter:clamp(1rem,4vw,3.25rem);
  --r:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset & base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img,picture,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ol,ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,dl,dd{margin:0}
dt{font-weight:400}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
::selection{background:var(--flag-yellow);color:#0A1220}

/* 中文排版：等宽数字 / 标题秩序 / 短段落 */
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.stack>*+*{margin-top:1rem}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:12px;top:-120px;z-index:130;
  padding:.6rem 1rem;background:var(--flag-blue);color:#fff;
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.06em;
  border-radius:var(--r);transition:top .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:12px;outline:2px solid var(--cyan);outline-offset:2px}

/* ---------- 布局骨架 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(2.5rem,6vw,5rem) 0}
.section--paper{background:var(--paper);color:var(--ink)}
.section--night{background:var(--blue-night);color:var(--white)}
.section--panel{background:var(--panel);color:var(--white)}
.section--night .lede,.section--panel .lede{color:var(--on-night-soft)}

.section-head{display:grid;gap:.6rem;max-width:60ch;margin-bottom:clamp(1.5rem,3vw,2.25rem)}
.section-idx{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;color:var(--flag-blue)}
.eyebrow{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--flag-yellow)}
.section-title{font-family:var(--font-display);font-size:clamp(1.5rem,3.2vw,2.4rem);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.lede{font-size:1rem;color:var(--ink-soft);max-width:60ch}

.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.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--sidebar{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr)}

/* 蓝图角标装饰 */
.blueprint{position:relative}
.blueprint::before,.blueprint::after{content:"";position:absolute;width:14px;height:14px;border:1px solid var(--cyan);opacity:.55;pointer-events:none}
.blueprint::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.blueprint::after{bottom:-1px;right:-1px;border-left:0;border-top:0}

/* ============================================================
   HEADER · 紧凑命令栏
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--blue-night);color:var(--white);
  border-bottom:1px solid var(--line);
}
.progress-rail{position:absolute;left:0;right:0;top:0;height:4px;background:rgba(255,255,255,.07)}
.progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--flag-blue),var(--cyan));
}
.header-inner{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(.75rem,2.6vw,2.25rem);min-height:66px;padding-top:4px;
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:.65rem;padding:.35rem 0}
.brand-mark{
  display:grid;place-items:center;width:30px;height:30px;flex:0 0 30px;
  border:1px solid var(--cyan);color:var(--cyan);
  font-family:var(--font-mono);font-size:.85rem;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-family:var(--font-display);font-size:1.02rem;font-weight:800;letter-spacing:-.01em;color:var(--white)}
.brand-sub{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.14em;color:var(--muted)}

/* 主导航 */
.site-nav{justify-self:center;min-width:0}
.nav-list{display:flex;align-items:stretch;gap:clamp(.2rem,1.3vw,.95rem)}
.nav-link{
  position:relative;display:flex;align-items:baseline;gap:.42rem;
  padding:.95rem .2rem;color:var(--on-night);font-size:.9rem;white-space:nowrap;
  transition:color .16s var(--ease);
}
.nav-idx{font-family:var(--font-mono);font-size:.66rem;color:var(--muted);letter-spacing:.06em}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--white)}
.nav-link:hover .nav-idx{color:var(--cyan)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--white);font-weight:700}
.nav-link[aria-current="page"] .nav-idx{color:var(--flag-yellow)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--flag-yellow)}

/* 右侧工具 */
.header-tools{display:flex;align-items:center;gap:.7rem;justify-self:end}
.status-chip{
  display:inline-flex;align-items:center;gap:.45rem;padding:.3rem .6rem;
  border:1px solid var(--line);font-family:var(--font-mono);
  font-size:.66rem;letter-spacing:.06em;color:var(--on-night);white-space:nowrap;
}
.status-dot{width:6px;height:6px;background:var(--flag-green);box-shadow:0 0 0 3px rgba(47,178,113,.16)}
.tool-link{
  display:inline-flex;align-items:center;gap:.4rem;padding:.34rem .7rem;
  border:1px solid var(--line);background:var(--panel);color:var(--white);
  font-size:.78rem;white-space:nowrap;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.tool-glyph{font-family:var(--font-mono);color:var(--cyan)}
.tool-link:hover{border-color:var(--cyan);background:#16223A}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:.5rem;padding:.45rem .7rem;
  border:1px solid var(--line);background:var(--panel);color:var(--white);font-size:.78rem;
}
.nav-toggle-bars{position:relative;display:block;width:16px;height:2px;background:var(--white);transition:background .16s var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--white);
  transition:transform .18s var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 赛事带 */
.round-strip{border-top:1px solid var(--line);background:rgba(18,28,48,.55)}
.round-strip-inner{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.4rem;padding-top:.4rem;padding-bottom:.4rem}
.round-item{display:inline-flex;align-items:baseline;gap:.5rem}
.round-key{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;color:var(--muted)}
.round-val{color:var(--white);font-size:.76rem;letter-spacing:.04em}

/* ============================================================
   FOOTER · 蓝图版面
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--blue-night);color:var(--on-night);
  border-top:1px solid var(--line);
}
.footer-grid-lines{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(34,48,74,.6) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(34,48,74,.45) 1px,transparent 1px);
  background-size:80px 80px;
  opacity:.55;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 88%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 88%);
}
.footer-inner{position:relative;padding-top:clamp(2.25rem,5vw,3.5rem);padding-bottom:clamp(1.5rem,3vw,2.25rem)}
.footer-head{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;
  gap:1rem;padding-bottom:1.5rem;border-bottom:1px solid var(--line);
}
.footer-line{margin-top:.6rem;max-width:36ch;font-size:.82rem;color:var(--on-night-soft);line-height:1.7}
.coord-mark{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;
  color:var(--cyan);border:1px solid var(--line);padding:.3rem .55rem;
}
.footer-columns{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(1.25rem,3vw,2.5rem);padding-top:clamp(1.5rem,3vw,2.25rem);
}
.footer-title{
  font-family:var(--font-mono);font-size:.7rem;font-weight:400;
  letter-spacing:.16em;text-transform:uppercase;color:var(--flag-yellow);margin-bottom:.9rem;
}
.footer-list{display:flex;flex-direction:column;gap:.5rem}
.footer-list a{font-size:.84rem;color:var(--on-night);transition:color .16s var(--ease)}
.footer-list a:hover{color:var(--cyan)}
.footer-list--mono li{font-family:var(--font-mono);font-size:.76rem;color:var(--on-night-soft);word-break:break-all}
.footer-text{font-size:.82rem;color:var(--on-night-soft);line-height:1.75;max-width:30ch}
.footer-text a{color:var(--flag-blue);border-bottom:1px solid rgba(46,155,230,.4)}
.footer-text--mono{font-family:var(--font-mono);font-size:.72rem;margin-top:.8rem}
.footer-base{border-top:1px solid var(--line);background:rgba(10,18,32,.72)}
.footer-base-inner{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;
  gap:.5rem 1.5rem;padding-top:1rem;padding-bottom:1rem;
}
.footer-meta{font-size:.7rem;color:var(--on-night-soft);letter-spacing:.02em}
.footer-copy{font-size:.7rem;color:var(--on-night-soft);letter-spacing:.06em}

/* 移动端固定快捷栏 */
.dock{display:none}

/* ============================================================
   通用组件
   ============================================================ */

/* 状态标签（经幡五色） */
.tag{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.14rem .5rem;border:1px solid currentColor;background:rgba(255,255,255,.03);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.04em;line-height:1.7;
}
.tag-dot{width:6px;height:6px;background:currentColor}
.tag--ok{color:var(--flag-green)}
.tag--warn{color:var(--flag-yellow)}
.tag--alert{color:var(--flag-red)}
.tag--info{color:var(--flag-blue)}
.tag--live{color:var(--cyan)}
.tag-row{display:flex;flex-wrap:wrap;gap:.4rem}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.7rem 1.15rem;border:1px solid var(--flag-blue);background:var(--flag-blue);
  color:#fff;font-size:.86rem;font-weight:600;border-radius:var(--r);
  transition:background .16s var(--ease),border-color .16s var(--ease),transform .12s var(--ease);
}
.btn:hover{background:#3FA9F0}
.btn:active{transform:translateY(1px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--on-night)}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(33,212,194,.08);color:var(--white)}
.btn--quiet{background:transparent;border-color:transparent;color:var(--flag-blue);padding-left:0;padding-right:0}
.btn--quiet:hover{background:transparent;color:var(--cyan)}

/* 面包屑 */
.breadcrumb{padding:1rem 0;color:var(--muted)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em}
.breadcrumb-list>li{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumb-list>li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:inherit;transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--white)}

/* 卡片 */
.card{
  position:relative;padding:clamp(1rem,2.4vw,1.5rem);
  border:1px solid var(--line);background:var(--panel);color:var(--white);border-radius:var(--r);
}
.card--paper{background:var(--white);border-color:var(--paper-line);color:var(--ink)}
.card--outline{background:transparent}
.card-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin-bottom:.7rem}
.card-title{font-family:var(--font-display);font-size:1.05rem;font-weight:800;letter-spacing:-.01em;line-height:1.35}
.card-idx{font-family:var(--font-mono);font-size:.68rem;color:var(--muted);letter-spacing:.06em}
.card--link{display:block;transition:border-color .16s var(--ease),transform .16s var(--ease)}
.card--link:hover{border-color:var(--cyan);transform:translateY(-1px)}
.card--link:hover .card-idx{color:var(--cyan)}
.meta-line{display:flex;flex-wrap:wrap;gap:.5rem 1rem;font-family:var(--font-mono);font-size:.7rem;color:var(--muted)}

/* 正文与纸张容器 */
.article-wrap{background:var(--white);border:1px solid var(--paper-line);padding:clamp(1.25rem,3vw,2.5rem)}
.prose{max-width:68ch;font-size:1rem;line-height:1.85;color:var(--ink)}
.prose p+p{margin-top:1rem}
.prose p{max-width:64ch}
.prose h2{font-family:var(--font-display);font-size:1.35rem;font-weight:800;letter-spacing:-.01em;line-height:1.3;margin:2rem 0 .75rem}
.prose h3{font-size:1.05rem;font-weight:700;margin:1.5rem 0 .5rem}
.prose ul,.prose ol{padding-left:1.2rem;list-style:disc}
.prose li{margin:.35rem 0}
.prose a{color:var(--flag-blue);border-bottom:1px solid rgba(46,155,230,.4)}
.prose strong{font-weight:700}

/* 键值表 */
.kv{display:grid;grid-template-columns:auto minmax(0,1fr);gap:.5rem 1rem;font-size:.86rem;align-items:baseline}
.kv dt{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:var(--muted)}
.kv dd{min-width:0;word-break:break-word}

/* 目录 / 章节索引 */
.toc{display:flex;flex-direction:column;gap:.15rem}
.toc-link{
  display:block;padding:.35rem .6rem;border-left:2px solid transparent;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.02em;color:var(--muted);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.toc-link:hover{color:var(--white)}
.toc-link.is-current{color:var(--cyan);border-left-color:var(--cyan)}

/* 图片容器基础规则（页面阶段放占位图） */
.figure{
  margin:0;border:1px solid var(--line);background:var(--panel);
  border-radius:var(--r);overflow:hidden;
}
.figure-media{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background-color:var(--panel);
  background-image:
    repeating-linear-gradient(0deg,rgba(34,48,74,.65) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(34,48,74,.65) 0 1px,transparent 1px 24px);
}
.figure-media>img,.figure-media>picture>img{width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:21/9}
.figure-media--tall{aspect-ratio:3/4}
.figure-media--square{aspect-ratio:1/1}
.figure-cap{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;
  padding:.6rem .8rem;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:.68rem;color:var(--muted);
}
.figure--paper{background:var(--white);border-color:var(--paper-line)}
.figure--paper .figure-media{
  background-color:#E7EDF5;
  background-image:
    repeating-linear-gradient(0deg,rgba(34,48,74,.14) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(34,48,74,.14) 0 1px,transparent 1px 24px);
}
.figure--paper .figure-cap{border-top-color:var(--paper-line);color:var(--ink-soft)}

/* 滚动显现 */
html.js [data-reveal]{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .nav-list{gap:.25rem}
  .nav-idx{display:none}
}

@media (max-width:1024px){
  .header-inner{grid-template-columns:auto auto;justify-content:space-between;gap:.75rem}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;z-index:99;
    background:var(--blue-night);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:0 var(--gutter);
    max-height:0;overflow:hidden;visibility:hidden;opacity:0;
    transition:max-height .26s var(--ease),opacity .18s var(--ease),visibility .18s linear;
  }
  .site-nav[data-open]{
    max-height:min(70vh,560px);overflow:auto;visibility:visible;opacity:1;
    padding-bottom:.75rem;
  }
  .nav-list{flex-direction:column;gap:0}
  .nav-link{
    justify-content:flex-start;padding:.85rem .1rem .85rem .7rem;
    border-bottom:1px solid rgba(34,48,74,.7);border-left:2px solid transparent;
    font-size:.95rem;
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{border-left-color:var(--flag-yellow);background:rgba(242,183,51,.06)}
  .nav-idx{display:inline}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .grid--2,.grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr)}
  body{padding-bottom:3.6rem}
  .dock{
    display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
    position:fixed;left:0;right:0;bottom:0;z-index:95;
    background:rgba(10,18,32,.97);border-top:1px solid var(--line);
  }
  .dock-link{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.1rem;
    padding:.5rem .25rem;border-right:1px solid var(--line);
    font-size:.72rem;color:var(--on-night);
  }
  .dock-link:last-child{border-right:0}
  .dock-link[aria-current="page"]{color:var(--white);background:rgba(33,212,194,.1)}
  .dock-idx{font-size:.6rem;color:var(--flag-yellow)}
}

@media (max-width:640px){
  .header-inner{min-height:58px}
  .brand-sub{display:none}
  .tool-text{display:none}
  .tool-link{padding:.36rem .5rem}
  .status-text{display:none}
  .status-chip{padding:.3rem .4rem}
  .round-item--clock{display:none}
  .round-strip-inner{gap:.35rem 1rem}
  .footer-columns{grid-template-columns:minmax(0,1fr);gap:1.75rem}
  .footer-head{padding-bottom:1.25rem}
  .coord-mark{align-self:flex-start}
}

/* 无障碍：减少动效 */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
}