/* =====================================================================
   AOA赛场 · /assets/site.css
   高原夜墨蓝底 / 荧光赛道绿与脉冲橙点状高亮 / 1px 网格 / 斜切赛道线
   ===================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body,h1,h2,h3,h4,h5,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;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
main{display:block}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0B1B33;
  --ink-deep:#071223;
  --ink-band:#0E2340;
  --green:#3BE08A;
  --orange:#FF7A2F;
  --teal:#1FA8A8;
  --red:#D93A38;
  --frost:#E9EFF7;
  --mist:#7C8FA6;
  --starbright:#F7FAFF;
  --grid:#1E3350;

  --rail-w:248px;
  --maxw:1180px;

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

  --ease:cubic-bezier(.2,.6,.25,1);
}

/* ---------- 3. 基础排版与底纹 ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--ink);
  background-image:
    radial-gradient(1.4px 1.4px at 12% 18%, rgba(233,239,247,.30), transparent 100%),
    radial-gradient(1.2px 1.2px at 68% 42%, rgba(233,239,247,.20), transparent 100%),
    radial-gradient(1.6px 1.6px at 34% 76%, rgba(59,224,138,.26), transparent 100%),
    radial-gradient(1px 1px at 88% 86%, rgba(233,239,247,.18), transparent 100%);
  background-size:620px 620px,480px 480px,760px 760px,540px 540px;
  background-attachment:fixed;
  color:var(--frost);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.01em;
  color:var(--starbright);
  font-stretch:88%;
}
h1{font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.0}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem)}
h3{font-size:clamp(1.2rem,2.1vw,1.5rem);line-height:1.25}
h4{font-size:1.05rem;line-height:1.35}

p{max-width:74ch}
p + p{margin-top:1em}

::selection{background:var(--green);color:var(--ink-deep)}

:focus-visible{outline:2px solid var(--green);outline-offset:2px}

.num{font-family:var(--font-mono);font-weight:700;letter-spacing:.02em;font-variant-numeric:tabular-nums}

.rule{height:1px;background:var(--grid);border:0;margin:0}

/* ---------- 4. 布局容器 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,4vw,56px)}

.section{position:relative;padding-block:clamp(52px,7vw,104px)}
.section--tight{padding-block:clamp(32px,4vw,56px)}
.section--deep{background:var(--ink-deep)}
.section--band{background:linear-gradient(180deg,var(--ink-band) 0%,var(--ink) 100%)}
.section--band::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grid)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}

/* ---------- 5. 装饰语言 ---------- */
.track-lines{
  position:absolute;inset:0;pointer-events:none;overflow:hidden;
  background-image:repeating-linear-gradient(102deg, rgba(31,168,168,.15) 0 1px, transparent 1px 72px);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 88%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 88%);
}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--teal);
}

.tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  line-height:1.4;
  padding:3px 8px;
  border:1px solid var(--grid);
  color:var(--mist);
  white-space:nowrap;
}
.tag--green{color:var(--green);border-color:rgba(59,224,138,.45);background:rgba(59,224,138,.08)}
.tag--teal{color:var(--teal);border-color:rgba(31,168,168,.45);background:rgba(31,168,168,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,47,.5);background:rgba(255,122,47,.08)}
.tag--red{color:var(--red);border-color:rgba(217,58,56,.5);background:rgba(217,58,56,.08)}

.card{
  position:relative;
  padding:clamp(18px,2.2vw,26px);
  border:1px solid var(--grid);
  background:linear-gradient(180deg,rgba(30,51,80,.42) 0%,rgba(11,27,51,.10) 100%);
}
.card--flat{background:rgba(30,51,80,.18)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-num{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(2rem,5vw,3.4rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--green);
}
.stat-label{font-size:13px;letter-spacing:.06em;color:var(--mist)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:44px;
  padding:.62rem 1.05rem;
  border:1px solid transparent;
  border-radius:0;
  font-size:.94rem;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  text-align:center;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--orange);color:#180D04}
.btn-primary:hover{background:#FF9152}
.btn-ghost{border-color:var(--grid);color:var(--frost);background:rgba(233,239,247,.03)}
.btn-ghost:hover{border-color:var(--green);color:var(--green);background:rgba(59,224,138,.08)}
.btn-green{background:var(--green);color:#04200F}
.btn-green:hover{background:#5EEBA2}

.copy-btn{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.1em;
  padding:2px 8px;
  border:1px solid var(--grid);
  color:var(--teal);
  background:transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.copy-btn:hover{border-color:var(--teal);background:rgba(31,168,168,.12)}
.copy-btn.is-copied{color:var(--green);border-color:var(--green);background:rgba(59,224,138,.14)}

/* ---------- 7. 面包屑 / 目录 ---------- */
.crumbs{font-size:13px;color:var(--mist);letter-spacing:.02em}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:var(--grid)}
.crumbs a:hover{color:var(--green)}
.crumbs [aria-current="page"]{color:var(--frost)}

.toc{position:relative}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-link{
  display:block;
  padding:7px 10px;
  border-left:2px solid var(--grid);
  font-size:13.5px;
  color:var(--mist);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.toc-link:hover{color:var(--frost);background:rgba(31,168,168,.08)}
.toc-link[aria-current="true"]{
  color:var(--green);
  border-left-color:var(--orange);
  background:rgba(59,224,138,.08);
}

/* ---------- 8. 图片容器基础规则 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--grid);
  background:var(--ink-deep);
}
.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(1.06) contrast(1.06)}
.media::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--green) 0%,var(--orange) 45%,transparent 88%);
  opacity:.85;
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--21x9{aspect-ratio:21/9}
.media--1x1{aspect-ratio:1/1}
.media__ph{
  position:absolute;inset:0;
  display:grid;place-items:center;
  background-image:
    linear-gradient(rgba(30,51,80,.9) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,51,80,.9) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-align:center;
  padding:16px;
}
.media__cap{margin-top:10px;font-size:12.5px;line-height:1.7;color:var(--mist)}

/* ---------- 9. 头部：桌面左侧轨道 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 16px;
  background:var(--green);
  color:var(--ink-deep);
  font-size:14px;font-weight:700;
  transform:translateY(-200%);
  transition:transform .16s var(--ease);
}
.skip-link:focus{transform:none}

.site-header{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:70;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,var(--ink-deep) 0%,var(--ink) 58%,#091729 100%);
  border-right:1px solid var(--grid);
}

.topbar{display:none}

.rail{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  gap:22px;
  padding:26px 0 22px;
  overflow-y:auto;
  overscroll-behavior:contain;
}

.rail-brand{display:flex;flex-direction:column;gap:10px;padding:0 22px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  font-family:var(--font-mono);
  font-size:15px;font-weight:700;letter-spacing:.06em;
  line-height:1;
  padding:4px 7px;
  background:var(--green);
  color:var(--ink-deep);
}
.brand-name{
  font-family:var(--font-display);
  font-size:19px;font-weight:900;letter-spacing:.02em;
  color:var(--starbright);
}
.brand-line{font-size:12.5px;line-height:1.7;color:var(--mist);max-width:none}
.version-badge{
  align-self:flex-start;
  font-family:var(--font-mono);
  font-size:11.5px;font-weight:700;letter-spacing:.12em;
  line-height:1.4;
  padding:3px 8px;
  color:var(--orange);
  border:1px solid rgba(255,122,47,.5);
  background:rgba(255,122,47,.07);
}

.rail-nav{flex:1 1 auto;counter-reset:navidx}
.nav-list{display:flex;flex-direction:column}
.nav-list li{position:relative}
.nav-list a{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:12px 22px;
  border-left:2px solid transparent;
  font-size:15px;
  font-weight:600;
  color:var(--frost);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-list a::before{
  counter-increment:navidx;
  content:counter(navidx,decimal-leading-zero);
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.nav-list a:hover{background:rgba(59,224,138,.06);color:var(--starbright)}
.nav-list a[aria-current="page"]{
  border-left-color:var(--orange);
  background:linear-gradient(90deg,rgba(255,122,47,.16) 0%,rgba(255,122,47,0) 80%);
  color:var(--starbright);
}
.nav-list a[aria-current="page"]::before{color:var(--orange)}
.nav-list a[aria-current="page"]::after{
  content:"";
  position:absolute;
  right:18px;top:50%;
  width:6px;height:6px;
  margin-top:-3px;
  background:var(--green);
  transform:rotate(45deg);
}

.rail-foot{
  display:flex;flex-direction:column;gap:12px;
  padding:18px 22px 0;
  border-top:1px solid var(--grid);
}
.rail-actions{display:flex;flex-direction:column;gap:8px}
.rail-actions .btn{width:100%}
.rail-note{font-size:12px;line-height:1.75;color:var(--mist);max-width:none}

.nav-toggle{display:none}
.nav-toggle-bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bar{display:block;height:2px;width:100%;background:var(--green);transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-scrim{display:none}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,88px);
  background:linear-gradient(180deg,#08182D 0%,var(--ink-deep) 100%);
  border-top:1px solid var(--grid);
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--green) 0%,var(--teal) 38%,transparent 92%);
  opacity:.75;
}

.foot-wrap{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(38px,5vw,66px) clamp(18px,4vw,56px) clamp(28px,3vw,40px);
  display:grid;
  gap:clamp(28px,4vw,54px);
  grid-template-columns:minmax(240px,1fr) minmax(0,1.7fr);
}

.foot-brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.foot-summary{font-size:14px;line-height:1.85;color:var(--frost);max-width:34ch}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px}

.foot-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.foot-group{min-width:0}
.foot-heading{
  font-family:var(--font-mono);
  font-size:12px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:14px;
}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a{
  position:relative;
  display:inline-block;
  padding-left:14px;
  font-size:14.5px;
  color:var(--frost);
  transition:color .16s var(--ease);
}
.foot-list a::before{
  content:"";position:absolute;left:0;top:.74em;
  width:6px;height:1px;background:var(--grid);
  transition:background-color .16s var(--ease),width .16s var(--ease);
}
.foot-list a:hover{color:var(--green)}
.foot-list a:hover::before{background:var(--green);width:10px}

.foot-contact{
  grid-column:1 / -1;
  padding-top:clamp(20px,2.4vw,30px);
  border-top:1px solid var(--grid);
}
.contact-list{display:flex;flex-wrap:wrap;gap:14px 36px}
.contact-item{display:flex;align-items:center;flex-wrap:wrap;gap:10px;max-width:100%}
.contact-key{
  font-family:var(--font-mono);
  font-size:11.5px;font-weight:700;letter-spacing:.14em;
  color:var(--mist);
}
.contact-val{font-size:14.5px;color:var(--frost);word-break:break-word}
.foot-note{margin-top:14px;font-size:12.5px;line-height:1.8;color:var(--mist);max-width:76ch}

.foot-bottom{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:18px clamp(18px,4vw,56px) 34px;
  border-top:1px solid var(--grid);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  font-size:13px;
  color:var(--mist);
}
.foot-legal{max-width:none;font-family:var(--font-mono);letter-spacing:.02em}
.foot-legal-links{display:flex;flex-wrap:wrap;gap:18px;max-width:none}
.foot-legal-links a{transition:color .16s var(--ease)}
.foot-legal-links a:hover{color:var(--green)}

/* ---------- 11. 滚动进度与返回顶部（脚本生成） ---------- */
.scroll-progress{
  position:fixed;
  top:0;right:0;bottom:0;
  width:6px;
  z-index:90;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(124,143,166,.30) 0 1px,transparent 1px 16px);
}
.scroll-progress-fill{
  position:absolute;
  top:0;right:0;
  width:2px;height:0;
  background:linear-gradient(180deg,var(--green) 0%,var(--orange) 100%);
}

.to-top{
  position:fixed;
  right:20px;bottom:24px;
  z-index:88;
  width:46px;height:46px;
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--green);
  background:rgba(7,18,35,.92);
  border:1px solid var(--grid);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s,color .18s var(--ease),border-color .18s var(--ease);
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--orange);border-color:var(--orange)}

/* ---------- 12. 显现动画协议 ---------- */
.is-reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.is-reveal-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1080px){
  body{font-size:16.5px}
  .foot-wrap{grid-template-columns:1fr}
  .foot-groups{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:960px){
  html{scroll-padding-top:78px}
  body{padding-left:0;padding-top:64px}

  .site-header{
    inset:0 0 auto 0;
    width:100%;
    height:64px;
    flex-direction:row;
    border-right:0;
    border-bottom:1px solid var(--grid);
    background:rgba(7,18,35,.97);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
  }

  .topbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    width:100%;
    padding:0 14px;
  }
  .topbar-brand{
    display:inline-flex;align-items:center;gap:8px;
    font-family:var(--font-display);
    font-size:17px;font-weight:900;letter-spacing:.02em;
    color:var(--starbright);
  }
  .topbar-badge{
    font-family:var(--font-mono);
    font-size:11px;font-weight:700;letter-spacing:.1em;
    color:var(--orange);
    border:1px solid rgba(255,122,47,.5);
    padding:2px 6px;
  }

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:9px;
    min-height:44px;
    padding:0 12px;
    border:1px solid var(--grid);
    background:rgba(30,51,80,.35);
    color:var(--frost);
    font-size:13px;
    font-weight:700;
    letter-spacing:.08em;
  }
  .nav-toggle[aria-expanded="true"]{border-color:var(--orange);color:var(--orange)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:var(--orange)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .rail{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(86vw,320px);
    height:100%;
    z-index:80;
    gap:20px;
    padding:22px 0 28px;
    overflow-y:auto;
    background:linear-gradient(180deg,var(--ink-deep) 0%,var(--ink) 70%,#091729 100%);
    border-right:1px solid var(--grid);
    box-shadow:26px 0 60px rgba(0,0,0,.55);
    transform:translateX(-103%);
    transition:transform .22s var(--ease);
  }
  .site-header[data-open] .rail{transform:none}

  .nav-scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:75;
    background:rgba(4,10,20,.68);
    opacity:0;
    pointer-events:none;
    transition:opacity .22s var(--ease);
  }
  .site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

  .rail-brand{padding:0 20px}
  .nav-list a{padding:13px 20px;font-size:15.5px}
  .rail-foot{padding:18px 20px 0}

  .scroll-progress{width:4px}
  .to-top{right:14px;bottom:16px;width:44px;height:44px}
}

@media (max-width:720px){
  .foot-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .contact-list{flex-direction:column;gap:12px}
  .contact-item{gap:8px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  body{font-size:16px}
  .foot-groups{grid-template-columns:1fr}
  .foot-tags .tag{font-size:11.5px}
  .btn{width:100%}
  .rail-actions .btn{width:100%}
}

/* ---------- 14. 焦点与减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .is-reveal-ready [data-reveal]{opacity:1;transform:none}
  .scroll-progress-fill{transition:none}
}