/* ==========================================================================
   A8赛场 · 共享样式表  /assets/site.css
   夜间赛场控制台：深空蓝黑底 / 荧光绿信号 / 电光橙状态
   ========================================================================== */

/* 1. 设计变量 ------------------------------------------------------------- */
:root{
  --ink:#070B14;
  --panel:#141B26;
  --lime:#B6FF2E;
  --orange:#FF7A1A;
  --white:#EAF2F8;
  --muted:#93A3B5;
  --moss:#4C7A5A;
  --clay:#C56A4B;
  --paper:#F2EFE7;
  --line:#26303D;

  --wrap:1200px;
  --r-lg:26px;
  --r-md:18px;
  --r-sm:12px;
  --r-pill:999px;

  --font-head:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --font-serif:Georgia,"Times New Roman","Songti SC","SimSun",serif;

  --ease:cubic-bezier(.2,.75,.28,1);
  --t-fast:150ms;
  --t-mid:260ms;
  --shadow-lift:0 22px 46px -28px rgba(0,0,0,.95);
}

/* 2. Reset 与基础 --------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(90deg,rgba(147,163,181,.055) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(147,163,181,.055) 0 1px,transparent 1px 96px);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);font-weight:900;line-height:1.08;letter-spacing:-.02em;margin:0}
h1{font-size:clamp(34px,6.2vw,62px)}
h2{font-size:clamp(24px,3.6vw,38px)}
h3{font-size:clamp(19px,2.2vw,24px)}
h4{font-size:17px;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
strong{font-weight:700}

/* 3. 排版与工具类 --------------------------------------------------------- */
.lede{font-size:clamp(16px,1.5vw,18.5px);line-height:1.85;color:var(--muted);max-width:62ch}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.muted{color:var(--muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--lime);
}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--orange);flex:0 0 auto}
.rule{height:2px;border:0;margin:clamp(28px,4vw,48px) 0;
  background:repeating-linear-gradient(90deg,var(--line) 0 18px,transparent 18px 36px)}

/* 4. 布局容器 ------------------------------------------------------------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.wrap--narrow{max-width:820px}
.section{padding:clamp(46px,6.5vw,86px) 0;position:relative}
.section-head{display:flex;flex-direction:column;gap:12px;max-width:820px;margin-bottom:clamp(22px,3vw,36px)}
.section-title{font-size:clamp(24px,3.6vw,38px)}
.section.is-current::before{content:"";position:absolute;left:0;top:0;width:3px;height:64px;border-radius:2px;background:var(--lime)}

.grid{display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
@media (min-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:960px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
}

/* 5. 按钮 ----------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:var(--r-pill);
  font-family:var(--font-body);font-size:15px;font-weight:700;line-height:1;
  text-decoration:none;cursor:pointer;
  transition:transform var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.btn--primary{background:var(--lime);color:var(--ink)}
.btn--primary:hover{background:#CDFF6B;transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--line)}
.btn--ghost:hover{color:var(--lime);border-color:var(--lime)}
.btn--sm{padding:9px 16px;font-size:13.5px}

/* 6. 卡片 / 标签 / 数字 ---------------------------------------------------- */
.card{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:clamp(20px,2.4vw,28px);
  transition:transform var(--t-mid) var(--ease),border-color var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(182,255,46,.45);box-shadow:var(--shadow-lift)}
.card--paper{background:var(--paper);color:#12161D;border-color:#DCD6C6}
.card--paper p,.card--paper .muted{color:#4A525E}
.card--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
  border-radius:var(--r-lg) var(--r-lg) 0 var(--r-lg);
}
.card-title{font-size:20px;line-height:1.3}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.06em;line-height:1.7;
  background:rgba(182,255,46,.14);color:var(--lime);border:1px solid rgba(182,255,46,.35);
}
.tag--orange{background:rgba(255,122,26,.16);color:var(--orange);border-color:rgba(255,122,26,.42)}
.tag--moss{background:rgba(76,122,90,.24);color:#9FD3AE;border-color:rgba(76,122,90,.6)}
.tag--clay{background:rgba(197,106,75,.2);color:#EBA184;border-color:rgba(197,106,75,.55)}
.tag--muted{background:rgba(147,163,181,.12);color:var(--muted);border-color:var(--line)}

.score{display:inline-flex;align-items:baseline;gap:8px;font-family:var(--font-mono);font-weight:700;
  font-size:clamp(30px,5vw,52px);line-height:1;color:var(--lime);letter-spacing:-.02em}
.score-unit{font-size:.36em;letter-spacing:.16em;color:var(--orange)}
.score-label{font-size:.28em;letter-spacing:.18em;color:var(--muted)}

.stat{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--lime);
  border-radius:var(--r-md);padding:16px 18px}
.stat-value{font-family:var(--font-mono);font-size:26px;font-weight:700;line-height:1.2;color:var(--lime)}
.stat-label{font-size:13px;color:var(--muted)}

/* 7. 图片容器基础规则 ------------------------------------------------------ */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-lg);
  aspect-ratio:16/9;background-color:#101823;
  background-image:repeating-linear-gradient(135deg,rgba(147,163,181,.1) 0 10px,transparent 10px 20px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__badge{position:absolute;left:14px;top:14px;z-index:2}
.media-frame__caption{position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:14px 16px;background:rgba(7,11,20,.8);font-size:13px;line-height:1.6}

/* 8. 面包屑与章节目录 ------------------------------------------------------ */
.breadcrumbs{padding:14px 0;font-size:13px;color:var(--muted)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"/";color:var(--line)}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--lime)}
.breadcrumbs [aria-current="page"]{color:var(--white)}

.toc-link{
  display:block;padding:10px 14px;border-left:2px solid var(--line);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--muted);font-size:14px;text-decoration:none;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.toc-link:hover{color:var(--white);border-color:var(--lime)}
.toc-link.is-current,.toc-link[aria-current="true"]{color:var(--lime);border-color:var(--lime);background:rgba(182,255,46,.08)}

/* 9. 头部 ----------------------------------------------------------------- */
.skip-link{
  position:fixed;left:16px;top:-72px;z-index:200;
  padding:10px 18px;border-radius:0 0 14px 14px;
  background:var(--lime);color:var(--ink);font-weight:700;text-decoration:none;
  transition:top var(--t-fast) var(--ease);
}
.skip-link:focus{top:0}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,11,20,.96);
  border-bottom:1px solid var(--line);
}
.header-rail{
  display:flex;align-items:center;gap:14px;
  width:100%;max-width:var(--wrap);margin:0 auto;
  padding:10px 20px;min-height:66px;
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;color:var(--white)}
.brand--footer{margin-bottom:2px}
.brand-mark{position:relative;display:grid;place-items:center;width:30px;height:30px;
  background:var(--lime);clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%)}
.brand-pulse{width:9px;height:9px;border-radius:50%;background:var(--ink);animation:pulse 1.9s var(--ease) infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(.5);opacity:.5}}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-text strong{font-family:var(--font-head);font-size:17px;font-weight:900;letter-spacing:.02em}
.brand-text em{font-family:var(--font-mono);font-style:normal;font-size:9.5px;letter-spacing:.26em;color:var(--muted)}

.header-signal{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);white-space:nowrap}
.signal-dot{width:8px;height:8px;border-radius:50%;background:var(--orange);animation:signal 2.4s linear infinite}
@keyframes signal{
  0%,100%{box-shadow:0 0 0 0 rgba(255,122,26,.55)}
  50%{box-shadow:0 0 0 7px rgba(255,122,26,0)}
}
.signal-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}

.site-nav{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:block;padding:9px 13px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;text-decoration:none;color:var(--white);
  transition:color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.nav-link:hover{color:var(--lime);background:rgba(182,255,46,.1)}
.nav-link[aria-current="page"]{color:var(--ink);background:var(--lime);font-weight:700}
.nav-cta{padding:10px 18px;font-size:14px}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 14px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:transparent;color:var(--white);font-size:13px;font-weight:700;cursor:pointer;
}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:var(--lime);
  transition:background-color var(--t-fast) var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--lime);
  transition:transform var(--t-mid) var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-text{font-family:var(--font-mono);letter-spacing:.1em}

.header-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden}
.header-progress-bar{display:block;height:100%;width:100%;
  background:var(--lime);transform:scaleX(0);transform-origin:0 50%;
  transition:transform 120ms linear}

.tabbar{display:none}
.tabbar-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr))}
.tabbar-link{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:8px 2px 10px;font-size:11.5px;text-decoration:none;color:var(--muted);
}
.tabbar-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:inherit}
.tabbar-link[aria-current="page"]{color:var(--lime)}

/* 10. 页脚 ---------------------------------------------------------------- */
.site-footer{
  position:relative;margin-top:clamp(56px,8vw,96px);
  background:var(--panel);border-top:1px solid var(--line);
  padding-top:clamp(40px,5vw,64px);
}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;width:88px;height:5px;
  background:var(--lime);box-shadow:96px 0 0 0 var(--orange)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:30px}
.footer-col{min-width:0}
.footer-col--brand{display:flex;flex-direction:column}
.footer-col--signal{min-width:0}
.footer-title{font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;color:var(--lime);margin-bottom:14px}
.footer-list li+li{margin-top:10px}
.footer-list a{color:var(--muted);font-size:14px;text-decoration:none;transition:color var(--t-fast) var(--ease)}
.footer-list a:hover{color:var(--lime)}
.footer-tagline{margin-top:14px;max-width:34ch;font-size:14px;line-height:1.75;color:var(--muted)}
.footer-reg{margin-top:10px;font-family:var(--font-mono);font-size:12px;color:var(--muted)}
.footer-contact{font-size:14px;color:var(--muted)}
.footer-contact li{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-start}
.footer-contact li+li{margin-top:10px}
.footer-label{flex:0 0 auto;min-width:42px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.14em;color:var(--orange)}
.signal-list{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.signal-row{display:flex;justify-content:space-between;gap:10px;padding:11px 14px;
  font-size:13px;background:rgba(7,11,20,.5)}
.signal-row+.signal-row{border-top:1px solid var(--line)}
.signal-name{color:var(--muted)}
.signal-value{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--lime)}
.footer-note{margin-top:12px;font-size:12px;line-height:1.7;color:var(--muted)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 22px;
  margin-top:clamp(32px,4vw,48px);padding:18px 20px calc(18px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line);text-align:center;
}
.footer-copy{font-family:var(--font-mono);font-size:12.5px;color:var(--muted)}

@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr 1.3fr;gap:28px}
}

/* 11. 响应式：平板与移动 --------------------------------------------------- */
@media (max-width:1023px){
  .site-header{background:var(--ink)}
  .header-signal{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(86vw,340px);margin:0;
    display:flex;flex-direction:column;align-items:stretch;gap:18px;
    padding:84px 20px 32px;overflow-y:auto;
    background:var(--panel);border-left:1px solid var(--line);
    box-shadow:-28px 0 64px -32px #000;
    transform:translateX(103%);
    transition:transform var(--t-mid) var(--ease);
  }
  .site-nav[data-open]{transform:translateX(0)}
  html[data-nav-open] body{overflow:hidden}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{padding:15px 14px;font-size:17px;border-radius:14px;border-bottom:1px solid var(--line)}
  .nav-link[aria-current="page"]{border-radius:14px}
  .nav-cta{justify-content:center;margin-top:6px;padding:14px 20px;font-size:15px}
  .tabbar{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(20,27,38,.98);border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .site-footer{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .header-rail{padding:8px 16px;min-height:60px}
  .brand-text em{display:none}
}

/* 12. 无障碍与动效偏好 ----------------------------------------------------- */
a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--lime);outline-offset:3px;border-radius:8px;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .card:hover{transform:none}
  .btn--primary:hover{transform:none}
  .header-progress-bar{transition:none}
}