/* ============================================================
   YABO赛事 · 共享样式 /assets/site.css
   深墨蓝基底 + 电光青脉冲 + 暖橙动作色；1px 印刷描边，无投影
   ============================================================ */

:root{
  --ink-950:#060E1A;
  --ink-900:#0B1728;
  --ink-800:#12233A;
  --side-slate:#223349;
  --paper-050:#EEF2F6;
  --mist-300:#A9B7C8;
  --line-steel:#3C4D63;
  --pulse-cyan:#2FE0C8;
  --signal-amber:#FF8A3D;
  --text-white:#FFFFFF;
  --rail-w:15.5rem;
  --gutter:clamp(1.125rem,4vw,2.5rem);
  --dur:160ms;
  --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html[data-scale="lg"]{font-size:112.5%}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--mist-300);
  font-family:var(--font-sans);
  line-height:1.7;
  letter-spacing:.01em;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
[hidden]{display:none!important}
::selection{background:var(--pulse-cyan);color:var(--ink-950)}
:focus-visible{outline:2px solid var(--pulse-cyan);outline-offset:2px}
#main-content{display:block;scroll-margin-top:5.5rem}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.meta{font-size:.78rem;color:var(--mist-300);letter-spacing:.05em}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;left:.75rem;top:-4rem;z-index:200;
  background:var(--pulse-cyan);color:var(--ink-950);
  padding:.6rem 1rem;font-size:.85rem;font-weight:700;text-decoration:none;
  transition:top var(--dur) ease-out;
}
.skip-link:focus{top:.75rem}

/* ---------- 刊头带 ---------- */
.site-header{position:sticky;top:0;z-index:60}
.masthead{
  background:rgba(6,14,26,.94);
  border-bottom:1px solid var(--line-steel);
  backdrop-filter:blur(6px);
}
.masthead__inner{
  display:flex;align-items:center;gap:clamp(.6rem,2vw,1.6rem);
  max-width:1440px;margin:0 auto;
  padding:.55rem var(--gutter);
}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--text-white)}
.brand--compact{font-weight:700;letter-spacing:-.01em}
.brand__tick{display:block;width:1.4rem;height:2px;background:var(--pulse-cyan);flex:none}
.brand__name{font-size:1.02rem;font-weight:700;letter-spacing:-.01em;color:var(--text-white)}

.masthead__issue{display:none;font-size:.75rem;letter-spacing:.12em;color:var(--mist-300);white-space:nowrap}
.masthead__dot{display:inline-block;width:4px;height:4px;background:var(--line-steel);margin:0 .6rem;vertical-align:middle}
.masthead__pulse{
  display:inline-flex;align-items:center;gap:.4rem;
  border:1px solid var(--signal-amber);color:var(--signal-amber);
  font-size:.74rem;font-weight:700;letter-spacing:.1em;
  padding:.3rem .55rem;text-decoration:none;
}
.masthead__pulse:hover{background:var(--signal-amber);color:var(--ink-950)}
.masthead__contact{display:none;align-items:baseline;gap:.5rem;font-size:.78rem}
.masthead__contact-label{color:var(--line-steel);letter-spacing:.1em}
.masthead__contact-value{color:var(--mist-300);text-decoration:none;border-bottom:1px solid transparent;font-family:var(--font-mono)}
.masthead__contact-value:hover{color:var(--text-white);border-bottom-color:var(--pulse-cyan)}

.util-row{display:none;margin-left:auto;gap:.35rem}
.util-btn{
  background:transparent;border:1px solid var(--line-steel);color:var(--mist-300);
  font-size:.74rem;letter-spacing:.08em;padding:.32rem .6rem;cursor:pointer;
  transition:border-color var(--dur),color var(--dur),background var(--dur);
}
.util-btn:hover{border-color:var(--pulse-cyan);color:var(--text-white);background:var(--ink-800)}
.util-btn[aria-pressed="true"]{background:var(--pulse-cyan);border-color:var(--pulse-cyan);color:var(--ink-950);font-weight:700}

.nav-toggle{
  display:inline-flex;align-items:center;gap:.5rem;margin-left:auto;
  background:var(--ink-800);border:1px solid var(--line-steel);
  color:var(--text-white);font-size:.78rem;letter-spacing:.1em;
  padding:.42rem .7rem;cursor:pointer;
  transition:border-color var(--dur),background var(--dur);
}
.nav-toggle:hover{border-color:var(--pulse-cyan);background:var(--ink-900)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px}
.nav-toggle__bar{display:block;width:15px;height:1px;background:var(--pulse-cyan)}
.nav-toggle__bar:nth-of-type(2){width:9px}
.nav-toggle[aria-expanded="true"]{border-color:var(--signal-amber)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar{background:var(--signal-amber)}
.nav-toggle__label{font-weight:700}

.scroll-meter{height:2px;background:transparent;overflow:hidden}
.scroll-meter__fill{display:block;height:100%;width:0;background:var(--pulse-cyan)}

/* ---------- 左侧档案栏 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:min(86vw,20rem);
  z-index:80;overflow-y:auto;overscroll-behavior:contain;
  background:var(--side-slate);
  border-right:1px solid var(--line-steel);
  transform:translateX(-100%);
  transition:transform var(--dur) ease-out;
}
.rail[data-open]{transform:none}
.rail__inner{
  display:flex;flex-direction:column;gap:1.4rem;
  min-height:100%;padding:1.4rem 1.25rem 1.6rem;
}
.rail__brand{display:flex;flex-direction:column;gap:.55rem;text-decoration:none}
.rail__brand .brand__tick{width:2.25rem}
.rail__brand-name{font-size:1.2rem;font-weight:700;letter-spacing:-.02em;color:var(--text-white)}
.rail__brand-sub{font-size:.72rem;line-height:1.6;letter-spacing:.06em;color:var(--mist-300)}
.rail__nav{display:flex;flex-direction:column}
.nav-list{display:flex;flex-direction:column}
.nav-list__item{border-top:1px solid var(--line-steel)}
.nav-list__item:last-child{border-bottom:1px solid var(--line-steel)}
.nav-link{
  display:block;padding:.6rem .5rem .6rem .7rem;
  border-left:2px solid transparent;
  color:var(--mist-300);font-size:.92rem;text-decoration:none;
  transition:color var(--dur),border-color var(--dur),background var(--dur),padding-left var(--dur);
}
.nav-link:hover{color:var(--text-white);border-left-color:var(--pulse-cyan);background:rgba(47,224,200,.06);padding-left:.85rem}
.nav-link[aria-current="page"]{color:var(--text-white);border-left-color:var(--signal-amber);background:rgba(255,138,61,.1);font-weight:600}

.pulse{
  display:flex;flex-direction:column;gap:.7rem;
  border:1px solid var(--line-steel);background:var(--ink-900);
  padding:.85rem .85rem 1rem;
}
.pulse__head{display:flex;align-items:center;justify-content:space-between;gap:.5rem}
.pulse__tag{
  background:var(--pulse-cyan);color:var(--ink-950);
  font-size:.7rem;font-weight:700;letter-spacing:.16em;padding:.2rem .45rem;
}
.pulse__toggle{
  background:transparent;border:1px solid var(--line-steel);color:var(--mist-300);
  font-size:.68rem;letter-spacing:.08em;padding:.24rem .45rem;cursor:pointer;
  transition:border-color var(--dur),color var(--dur);
}
.pulse__toggle:hover{border-color:var(--pulse-cyan);color:var(--text-white)}
.pulse__date{font-size:1.05rem;color:var(--text-white);line-height:1.4}
.pulse__strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;
  max-height:9.5rem;overflow-y:auto;
}
.pulse__chip{
  width:100%;padding:.32rem .1rem;background:transparent;
  border:1px solid var(--line-steel);color:var(--mist-300);
  font-family:var(--font-mono);font-size:.7rem;cursor:pointer;
  transition:border-color var(--dur),color var(--dur),background var(--dur);
}
.pulse__chip:hover{border-color:var(--pulse-cyan);color:var(--text-white)}
.pulse__chip[aria-current="true"]{background:var(--pulse-cyan);border-color:var(--pulse-cyan);color:var(--ink-950);font-weight:700}
.pulse__cta{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--signal-amber);border:1px solid var(--signal-amber);color:var(--ink-950);
  font-size:.8rem;font-weight:700;letter-spacing:.06em;padding:.5rem .7rem;text-decoration:none;
  transition:background var(--dur),color var(--dur);
}
.pulse__cta:hover{background:#FFA böhm}
.pulse__cta:hover{background:#FFA45F;color:var(--ink-950)}

.rail__quick{display:flex;flex-direction:column;gap:.5rem}
.quick-card{
  display:flex;flex-direction:column;gap:.2rem;
  border:1px solid var(--line-steel);background:var(--ink-900);
  padding:.6rem .7rem;text-decoration:none;
  transition:border-color var(--dur),background var(--dur);
}
.quick-card:hover{border-color:var(--pulse-cyan);background:var(--ink-800)}
.quick-card__title{color:var(--text-white);font-size:.88rem;font-weight:600}
.quick-card__note{color:var(--mist-300);font-size:.72rem;line-height:1.5}
.rail__foot{
  margin-top:auto;padding-top:.9rem;border-top:1px solid var(--line-steel);
  font-family:var(--font-mono);font-size:.7rem;color:var(--mist-300);letter-spacing:.02em;
}

/* 移动端遮罩（由 JS 在窄屏打开侧栏时设置 html[data-nav-open]） */
@media (max-width:1099px){
  html[data-nav-open]{overflow:hidden}
  html[data-nav-open] body::after{
    content:"";position:fixed;inset:0;z-index:70;background:rgba(6,14,26,.66);
  }
  .brand--compact{display:inline-flex}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-950);
  border-top:1px solid var(--line-steel);
  margin-top:clamp(2.5rem,6vw,5rem);
}
.footer__inner{
  display:grid;grid-template-columns:1fr;gap:clamp(1.5rem,4vw,3rem);
  max-width:1440px;margin:0 auto;
  padding:clamp(2.25rem,5vw,4rem) var(--gutter) 1.75rem;
}
.footer__brand{
  display:flex;flex-direction:column;gap:.55rem;
  padding-bottom:1.25rem;border-bottom:1px solid var(--line-steel);
}
.footer__brand-name{
  font-family:var(--font-serif);font-size:1.35rem;font-weight:600;
  letter-spacing:-.02em;color:var(--text-white);
}
.footer__brand-name::before{
  content:"";display:block;width:1.7rem;height:2px;background:var(--pulse-cyan);margin-bottom:.6rem;
}
.footer__brand-note{font-size:.78rem;color:var(--mist-300);letter-spacing:.05em}
.footer__grid{display:grid;grid-template-columns:1fr;gap:clamp(1.25rem,3vw,2.5rem)}
.footer__col{min-width:0}
.footer__heading{
  font-size:.72rem;font-weight:700;letter-spacing:.18em;
  color:var(--pulse-cyan);margin-bottom:.9rem;
}
.footer__list{display:flex;flex-direction:column;gap:.55rem}
.footer__link{
  color:var(--mist-300);font-size:.84rem;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur),border-color var(--dur);
}
.footer__link:hover{color:var(--text-white);border-bottom-color:var(--signal-amber)}
.footer__text{font-family:var(--font-mono);font-size:.8rem;color:var(--mist-300)}
.footer__note{font-size:.72rem;color:var(--mist-300);opacity:.72;letter-spacing:.04em}
.footer__contact-note{
  font-size:.76rem;line-height:1.7;color:var(--mist-300);
  border-left:2px solid var(--signal-amber);padding-left:.75rem;
}
.footer__legal{
  display:flex;flex-wrap:wrap;gap:.5rem 1.6rem;
  border-top:1px solid var(--line-steel);padding-top:1rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.05em;color:var(--mist-300);
}
.footer__legal-item{margin:0}

/* ---------- 通用容器与网格 ---------- */
.container{width:100%;max-width:1180px;margin:0 auto;padding-inline:var(--gutter)}
.container--narrow{max-width:760px}
.container--wide{max-width:1440px}
.grid{display:grid;gap:clamp(.9rem,2vw,1.5rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,19rem),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr))}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  border:1px solid var(--line-steel);background:transparent;color:var(--text-white);
  font-size:.86rem;font-weight:600;letter-spacing:.04em;
  padding:.6rem 1.05rem;text-decoration:none;cursor:pointer;
  transition:border-color var(--dur),background var(--dur),color var(--dur);
}
.btn:hover{border-color:var(--pulse-cyan);background:var(--ink-800)}
.btn--primary{background:var(--pulse-cyan);border-color:var(--pulse-cyan);color:var(--ink-950)}
.btn--primary:hover{background:#5EEAD9;border-color:#5EEAD9;color:var(--ink-950)}
.btn--amber{background:var(--signal-amber);border-color:var(--signal-amber);color:var(--ink-950)}
.btn--amber:hover{background:#FFA45F;border-color:#FFA45F}
.btn--ghost{border-color:var(--line-steel);color:var(--mist-300)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;
  padding-block:.9rem;font-size:.75rem;letter-spacing:.06em;color:var(--mist-300);
}
.breadcrumbs__item{color:var(--mist-300);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumbs__item:hover{color:var(--text-white);border-bottom-color:var(--pulse-cyan)}
.breadcrumbs__sep{color:var(--line-steel)}
.breadcrumbs [aria-current="page"]{color:var(--text-white);border-bottom-color:var(--signal-amber)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-block;border:1px solid var(--line-steel);background:transparent;
  color:var(--mist-300);font-size:.68rem;letter-spacing:.14em;padding:.22rem .5rem;
}
.tag--cyan{border-color:var(--pulse-cyan);color:var(--pulse-cyan)}
.tag--amber{border-color:var(--signal-amber);color:var(--signal-amber)}
.tag--solid{background:var(--signal-amber);border-color:var(--signal-amber);color:var(--ink-950);font-weight:700}

/* ---------- 章节 ---------- */
.section{padding-block:clamp(2.25rem,6vw,4.75rem)}
.section--paper{background:var(--paper-050);color:#33455C}
.section__eyebrow{
  display:block;margin-bottom:.7rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.22em;color:var(--pulse-cyan);
}
.section--paper .section__eyebrow{color:#0E7F72}
.section__title{
  font-family:var(--font-serif);font-weight:600;letter-spacing:-.02em;
  font-size:clamp(1.5rem,3.2vw,2.4rem);line-height:1.25;color:var(--text-white);
  margin-bottom:.6rem;
}
.section--paper .section__title{color:#0B1728}
.section__lead{max-width:62ch;font-size:.95rem;color:var(--mist-300)}
.section--paper .section__lead{color:#3A4C63}

/* ---------- 面板 ---------- */
.panel{border:1px solid var(--line-steel);background:var(--ink-900);padding:clamp(1rem,2.4vw,1.6rem)}
.panel--raised{background:var(--ink-800)}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:1rem;
  border-bottom:1px solid var(--line-steel);padding-bottom:.7rem;margin-bottom:1rem;
}
.panel__title{font-size:1rem;font-weight:600;color:var(--text-white)}
.panel__body{font-size:.92rem;color:var(--mist-300)}
.section--paper .panel{background:#FFFFFF;border-color:#C7D2DE}
.section--paper .panel__title{color:#0B1728}
.section--paper .panel__body{color:#3A4C63}
.section--paper .panel__head{border-bottom-color:#C7D2DE}

/* ---------- 长文 ---------- */
.prose{max-width:68ch;font-size:1rem;line-height:1.9;color:#33455C}
.prose h2{font-family:var(--font-serif);font-size:1.4rem;font-weight:600;letter-spacing:-.01em;color:#0B1728;margin:2rem 0 .6rem}
.prose h3{font-size:1.05rem;font-weight:700;color:#0B1728;margin:1.5rem 0 .5rem}
.prose p{margin-bottom:1rem}
.prose ul,.prose ol{list-style:disc;padding-left:1.2rem;margin-bottom:1rem}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4rem}
.prose a{color:#0B1728;text-decoration:underline;text-decoration-color:var(--signal-amber);text-underline-offset:3px}
.prose--dark{color:var(--mist-300)}
.prose--dark h2,.prose--dark h3{color:var(--text-white)}
.prose--dark a{color:var(--pulse-cyan);text-decoration-color:var(--pulse-cyan)}

/* ---------- 目录索引列表 ---------- */
.index-list{display:flex;flex-direction:column}
.index-list__item{border-top:1px solid var(--line-steel)}
.index-list__item:last-child{border-bottom:1px solid var(--line-steel)}
.index-list__link{
  display:grid;grid-template-columns:3.4rem 1fr;gap:.9rem;align-items:start;
  padding:.9rem .4rem .9rem .2rem;text-decoration:none;
  transition:background var(--dur),padding-left var(--dur);
}
.index-list__link:hover{background:rgba(47,224,200,.06);padding-left:.6rem}
.index-list__num{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.06em;color:var(--pulse-cyan);padding-top:.25rem}
.index-list__title{display:block;font-size:.98rem;font-weight:600;color:var(--text-white)}
.index-list__desc{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-top:.2rem;font-size:.82rem;line-height:1.6;color:var(--mist-300);
}
.section--paper .index-list__item{border-color:#C7D2DE}
.section--paper .index-list__title{color:#0B1728}
.section--paper .index-list__desc{color:#3A4C63}
.section--paper .index-list__num{color:#0E7F72}

/* ---------- 折叠问答 ---------- */
.disclosure{border:1px solid var(--line-steel);background:var(--ink-900);margin-bottom:.6rem}
.disclosure__summary{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.85rem 1rem;cursor:pointer;
  font-size:.94rem;font-weight:600;color:var(--text-white);
  list-style:none;
}
.disclosure__summary::-webkit-details-marker{display:none}
.disclosure__summary::after{content:"＋";font-family:var(--font-mono);color:var(--pulse-cyan)}
.disclosure[open] .disclosure__summary::after{content:"－";color:var(--signal-amber)}
.disclosure__body{
  padding:.85rem 1rem 1rem;border-top:1px solid var(--line-steel);
  font-size:.9rem;line-height:1.8;color:var(--mist-300);
}
.section--paper .disclosure{background:#FFFFFF;border-color:#C7D2DE}
.section--paper .disclosure__summary{color:#0B1728}
.section--paper .disclosure__body{color:#3A4C63;border-top-color:#C7D2DE}

/* ---------- 图片容器（页面阶段放图使用） ---------- */
.media-frame{
  position:relative;border:1px solid var(--line-steel);
  background:var(--ink-800);overflow:hidden;
}
.media-frame__inner{position:relative;aspect-ratio:16/9;background:var(--ink-900)}
.media-frame__inner img,.media-frame__inner svg{
  width:100%;height:100%;object-fit:cover;
  filter:grayscale(1) contrast(1.06);
}
.media-frame__inner--placeholder{
  background-image:
    repeating-linear-gradient(0deg,rgba(169,183,200,.12) 0 1px,transparent 1px 1.75rem),
    repeating-linear-gradient(90deg,rgba(169,183,200,.12) 0 1px,transparent 1px 1.75rem);
}
.media-frame--wide .media-frame__inner{aspect-ratio:21/9}
.media-frame--square .media-frame__inner{aspect-ratio:1/1}
.media-frame--portrait .media-frame__inner{aspect-ratio:3/4}
.media-frame__caption{
  padding:.5rem .7rem;border-top:1px solid var(--line-steel);
  background:var(--ink-900);color:var(--mist-300);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.03em;
}
.media-frame--paper{background:#DDE5EE;border-color:#C7D2DE}
.media-frame--paper .media-frame__inner{background:#E7EDF4}
.media-frame--paper .media-frame__caption{background:#E7EDF4;border-top-color:#C7D2DE;color:#3A4C63}

/* ---------- 响应式 ---------- */
@media (min-width:700px){
  .masthead__contact{display:flex}
  .util-row{display:flex}
  .brand--compact{display:none}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:699px){
  .nav-toggle{margin-left:auto}
}
@media (min-width:900px){
  .footer__inner{grid-template-columns:minmax(13rem,1fr) 2.6fr}
  .footer__brand{
    padding-bottom:0;border-bottom:0;border-right:1px solid var(--line-steel);
    padding-right:clamp(1rem,2vw,2rem);
  }
  .footer__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer__contact-note{grid-column:1 / -1}
  .footer__legal{grid-column:1 / -1}
}
@media (min-width:1100px){
  body{padding-left:var(--rail-w)}
  .rail{
    width:var(--rail-w);transform:none;transition:none;
  }
  .nav-toggle{display:none}
  .masthead__issue{display:block}
  .masthead__pulse{display:none}
  .masthead__contact{display:flex}
  .util-row{display:flex}
  .rail__inner{padding:1.75rem 1.35rem 1.85rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:.01ms!important;
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
  }
}