/* ==========================================================================
   HAHA 体育 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ========================================================================== */

/* --- 1. 变量 ------------------------------------------------------------ */
:root{
  --ink:#0C1A2B;
  --ink-deep:#050B14;
  --panel:#2B3138;
  --paper:#F1ECE2;
  --moss:#4E6B49;
  --clay:#C4643C;
  --neon:#B6FF3C;
  --amber:#FF8A2B;
  --ice:#7FD3F7;
  --rose:#FF4D7E;
  --black:#111820;

  --line:rgba(241,236,226,.18);
  --line-strong:rgba(241,236,226,.46);
  --text-soft:rgba(241,236,226,.62);

  --f-display:"Archivo Black","Space Grotesk","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --f-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --rail:72px;
  --bar:68px;
  --gap:24px;
  --pad:64px;
  --cut:32px;
  --progress:0;
}

/* --- 2. 重置 ------------------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

/* --- 3. 基础排版 ------------------------------------------------------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--f-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.6;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:900;line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(32px,5vw,54px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:18px}
p{max-width:70ch}
strong,b{font-weight:800;color:var(--neon)}
.mono{font-family:var(--f-mono);letter-spacing:.04em}
#main-content{display:block;scroll-margin-top:calc(var(--bar) + 24px)}

/* --- 4. 布局原语 ------------------------------------------------------- */
.container{width:100%;max-width:1320px;margin-inline:auto;padding-inline:clamp(18px,4vw,var(--pad))}
.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section--panel{background:var(--panel)}
.section--ink-deep{background:var(--ink-deep)}
.section--paper{
  background:var(--paper);
  color:var(--black);
  --line:rgba(17,24,32,.2);
  --line-strong:rgba(17,24,32,.5);
  --text-soft:rgba(17,24,32,.68);
}
.section--paper .chapter-no{-webkit-text-stroke-color:rgba(17,24,32,.4)}
.section--paper .lede{color:rgba(17,24,32,.7)}
.section--paper .stat-label{color:rgba(17,24,32,.62)}

.slant-top{clip-path:polygon(0 0,100% var(--cut),100% 100%,0 100%)}
.slant-bottom{clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),0 100%)}

.grid{display:grid;gap:var(--gap)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}

/* --- 5. 基础组件 ------------------------------------------------------- */
.chapter-head{
  display:grid;
  grid-template-columns:minmax(0,auto) minmax(0,1fr);
  gap:clamp(16px,3vw,44px);
  align-items:start;
  margin-bottom:clamp(24px,4vw,48px);
}
.chapter-no{
  font-family:var(--f-display);
  font-size:clamp(56px,9vw,132px);
  line-height:.85;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(241,236,226,.5);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:12px;line-height:1.3;
  letter-spacing:.18em;text-transform:uppercase;color:var(--ice);
}
.eyebrow::before{
  content:"";width:10px;height:10px;background:var(--neon);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.section-title{font-size:clamp(24px,3.2vw,40px);font-weight:900;line-height:1.15}
.lede{max-width:62ch;color:var(--text-soft);font-size:16px;margin-top:10px}

.card{
  position:relative;
  background:rgba(43,49,56,.5);
  border:1px solid var(--line);
  padding:clamp(16px,2.2vw,26px);
  border-radius:0;
  transition:border-color .18s ease,transform .18s ease;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.card-tag{
  position:absolute;top:0;right:0;
  font-family:var(--f-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  padding:5px 9px;background:var(--clay);color:var(--paper);
}
.paper-card{
  position:relative;
  background:var(--paper);color:var(--black);
  border:1px solid var(--black);
  padding:clamp(16px,2.2vw,26px);
}
.paper-card .lede{color:rgba(17,24,32,.72)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--f-mono);font-size:11px;line-height:1;
  letter-spacing:.1em;text-transform:uppercase;
  padding:5px 8px;border:1px solid currentColor;
}
.tag--neon{color:var(--neon)}
.tag--amber{color:var(--amber)}
.tag--ice{color:var(--ice)}
.tag--rose{color:var(--rose)}
.tag--moss{color:var(--moss)}
.tag--clay{color:var(--clay)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{font-family:var(--f-mono);font-weight:700;font-size:clamp(26px,4vw,44px);line-height:1.05;color:var(--neon)}
.stat-label{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;color:var(--text-soft)}

.index-list{display:grid;border-top:1px solid var(--line)}
.index-item{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:baseline;gap:clamp(12px,2vw,24px);
  padding:14px 4px;border-bottom:1px solid var(--line);
  text-decoration:none;
  transition:background .16s ease,padding-left .16s ease;
}
.index-item:hover,.index-item:focus-visible{background:rgba(182,255,60,.07);padding-left:14px}
.index-num{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;color:var(--clay)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--f-sans);font-size:14px;font-weight:800;line-height:1;
  padding:13px 20px;
  border:1px solid var(--line-strong);
  border-radius:0;
  color:var(--paper);text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--neon);border-color:var(--neon);color:var(--black)}
.btn-primary:hover,.btn-primary:focus-visible{background:#d6ff86;border-color:#d6ff86}
.btn-ghost{background:transparent}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--neon);color:var(--neon)}

.breadcrumb{padding-top:18px}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--f-mono);font-size:12px;color:var(--text-soft)}
.breadcrumb-list li+li::before{content:"/";margin-right:8px;color:rgba(127,211,247,.6)}
.breadcrumb-list a{text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb-list a:hover{border-bottom-color:var(--neon)}

.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-btn{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;
  padding:8px 12px;border:1px solid var(--line-strong);color:var(--text-soft);
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.filter-btn:hover{border-color:var(--neon);color:var(--paper)}
.filter-btn[aria-pressed="true"]{background:var(--rose);border-color:var(--rose);color:#fff}
.is-fading{opacity:.28;transition:opacity .12s ease}

.media-frame{
  position:relative;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);
  aspect-ratio:16/9;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05) contrast(1.05)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(241,236,226,.55) 1px,transparent 1px);
  background-size:5px 5px;opacity:.12;
}
.media-caption{margin-top:8px;font-family:var(--f-mono);font-size:12px;color:var(--text-soft)}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-visible{opacity:1;transform:none}

/* --- 6. 头部 ----------------------------------------------------------- */
.skip-link{
  position:absolute;left:10px;top:-80px;z-index:200;
  background:var(--neon);color:var(--black);
  padding:10px 16px;font-size:13px;font-weight:800;text-decoration:none;
  transition:top .16s ease;
}
.skip-link:focus{top:10px}

.site-header{position:sticky;top:0;z-index:80}

.brand-rail{
  position:fixed;left:0;top:0;bottom:0;z-index:90;width:var(--rail);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  gap:12px;padding:14px 0 18px;
  background:var(--ink-deep);
  border-right:1px solid var(--line);
}
.rail-brand{display:flex;flex-direction:column;align-items:center;gap:10px;text-decoration:none}
.rail-brand-mark{
  display:grid;place-items:center;width:34px;height:34px;
  background:var(--neon);color:var(--black);
  font-family:var(--f-display);font-size:14px;letter-spacing:-.02em;
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.rail-brand-text{writing-mode:vertical-rl;font-family:var(--f-mono);font-size:11px;letter-spacing:.28em;color:rgba(241,236,226,.78)}
.rail-status{writing-mode:vertical-rl;font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;color:var(--ice)}
.rail-progress{
  position:relative;flex:1 1 auto;width:2px;min-height:44px;margin:10px 0;
  background:rgba(241,236,226,.16);
}
.rail-progress-fill{
  position:absolute;left:0;top:0;width:100%;
  height:calc(var(--progress) * 100%);
  background:var(--neon);
  transition:height .12s linear;
}
.rail-contact{writing-mode:vertical-rl;font-size:11px;letter-spacing:.16em;color:rgba(241,236,226,.45)}

.header-bar{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:var(--bar);
  padding:0 clamp(16px,4vw,48px);
  background:var(--ink-deep);
  border-bottom:1px solid var(--line);
}
.header-brand{display:flex;align-items:center;min-width:0}
.brand-link{display:flex;flex-direction:column;gap:3px;padding:6px 0;text-decoration:none}
.brand-name{display:flex;align-items:center;font-size:clamp(15px,1.6vw,18px);font-weight:900;color:var(--paper)}
.brand-name::before{
  content:"";display:inline-block;width:9px;height:9px;margin-right:9px;
  background:var(--neon);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-tagline{font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;color:var(--text-soft)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:10px 12px;border:1px solid var(--line-strong);color:var(--paper);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.1em;
}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:var(--neon)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--neon);
  transition:transform .16s ease;
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.site-header[data-open] .nav-toggle-bars{background:var(--amber)}
.site-header[data-open] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.site-nav{display:flex;align-items:center;gap:clamp(12px,2vw,28px)}
.nav-list{display:flex;align-items:center;gap:clamp(10px,1.6vw,24px)}
.nav-list a{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 2px;font-size:14px;font-weight:700;letter-spacing:.02em;
  color:rgba(241,236,226,.76);text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.nav-list a:hover,.nav-list a:focus-visible{color:var(--paper);border-bottom-color:var(--ice)}
.nav-list a[aria-current="page"]{color:var(--neon);border-bottom-color:var(--neon)}
.nav-index{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;color:var(--ice);font-weight:400}
.nav-cta{white-space:nowrap}

/* --- 7. 页脚 ----------------------------------------------------------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  border-top:1px solid var(--line-strong);
  margin-top:clamp(40px,6vw,88px);
}
.site-footer::before{content:"";position:absolute;left:0;top:-1px;width:128px;height:3px;background:var(--neon)}
.footer-top{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:clamp(28px,4vw,56px);
  padding-top:clamp(40px,6vw,72px);
  padding-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--line);
}
.footer-kicker{font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ice)}
.footer-brand-name{
  margin-top:10px;font-family:var(--f-display);font-weight:900;
  font-size:clamp(24px,4.2vw,44px);line-height:1.06;color:var(--paper);
}
.footer-note{margin-top:12px;max-width:46ch;font-size:15px;color:var(--text-soft)}
.footer-cta{margin-top:20px}
.footer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,3vw,36px);align-content:start}
.footer-col-title{
  margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid var(--line);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.14em;color:var(--clay);
}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;font-size:15px;color:rgba(241,236,226,.82);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-link:hover,.footer-link:focus-visible{color:var(--neon);border-bottom-color:var(--neon)}
.footer-contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:clamp(16px,2.4vw,28px);
  padding-block:clamp(24px,3.6vw,40px);
  border-bottom:1px solid var(--line);
}
.contact-row{min-width:0}
.contact-label{
  display:block;margin-bottom:6px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;color:rgba(241,236,226,.5);
}
.contact-value{display:block;font-size:15px;color:var(--paper);word-break:break-word}
.copy-btn{
  margin-top:10px;padding:7px 11px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;
  border:1px solid var(--line-strong);color:var(--ice);
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.copy-btn:hover{border-color:var(--neon);color:var(--neon)}
.copy-btn[data-copied="true"]{background:var(--neon);border-color:var(--neon);color:var(--black)}
.footer-bottom{background:#03070E;border-top:1px solid var(--line)}
.footer-bottom-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 28px;
  padding-block:18px;
  font-family:var(--f-mono);font-size:12px;color:rgba(241,236,226,.52);
}
.footer-legal{color:rgba(241,236,226,.52)}
.footer-icp{color:var(--ice)}
.footer-copyright{margin-left:auto;color:rgba(241,236,226,.62);max-width:none}

/* --- 8. 响应式 --------------------------------------------------------- */
@media (min-width:900px){
  body{padding-left:var(--rail)}
}
@media (min-width:900px) and (max-height:720px){
  .rail-contact{display:none}
}
@media (max-width:1080px){
  .grid--7-5,.grid--8-4{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:899px){
  .brand-rail{
    position:static;width:100%;height:auto;z-index:auto;
    flex-direction:row;align-items:center;justify-content:flex-start;
    gap:14px;padding:8px clamp(16px,4vw,32px);
    border-right:0;border-bottom:1px solid var(--line);
    overflow-x:auto;scrollbar-width:none;
  }
  .brand-rail::-webkit-scrollbar{display:none}
  .rail-brand{flex:0 0 auto;flex-direction:row;align-items:center;gap:8px}
  .rail-brand-mark{width:26px;height:26px;font-size:12px}
  .rail-brand-text,.rail-status,.rail-contact{
    writing-mode:horizontal-tb;white-space:nowrap;letter-spacing:.08em;
  }
  .rail-brand-text{font-size:12px}
  .rail-status{font-size:11px}
  .rail-contact{margin-left:auto;font-size:11px}
  .rail-progress{display:none}

  .header-bar{padding-inline:clamp(16px,4vw,32px);min-height:62px}
  .brand-tagline{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;
    background:var(--ink-deep);
    border-bottom:1px solid var(--line-strong);
    max-height:0;overflow:hidden;visibility:hidden;opacity:0;
    transition:max-height .26s ease,opacity .16s ease,visibility .26s;
  }
  .site-header[data-open] .site-nav,
  .site-nav[data-open]{max-height:min(78vh,620px);overflow-y:auto;visibility:visible;opacity:1}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li{border-bottom:1px solid var(--line)}
  .nav-list a{
    padding:16px clamp(16px,4vw,32px);border-bottom:0;
    border-left:3px solid transparent;font-size:15px;
  }
  .nav-list a[aria-current="page"]{
    background:rgba(182,255,60,.08);
    border-left-color:var(--neon);
    border-bottom-color:transparent;
  }
  .nav-cta{display:flex;margin:16px clamp(16px,4vw,32px) 22px}

  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom-inner{padding-block:16px}
  .footer-copyright{margin-left:0;flex:1 1 100%}
  .chapter-head{grid-template-columns:minmax(0,1fr);gap:12px}
  .chapter-no{font-size:clamp(48px,18vw,96px)}
}
@media (max-width:560px){
  .grid{gap:16px}
  .card,.paper-card{padding:16px}
  .btn{width:100%}
  .nav-cta{width:auto}
  .filter-bar{gap:6px}
}

/* --- 9. 动效与可访问性 ------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .card:hover{transform:none}
  .rail-progress-fill{transition:none}
}