/* ============================================================
   /assets/site.css — 安博赛场 共享外壳
   夜间赛场指挥室 · 左右分屏系统 · 8px 基线网格
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0E1512;          /* 炭黑底 */
  --pitch:#0F2A22;        /* 深墨绿 */
  --panel:#17352B;        /* 墨绿面板 */
  --cyan:#4FF0D0;         /* 荧光青 · 结论与节点 */
  --amber:#F2A03D;        /* 琥珀橙 · 赔率与效率 */
  --white:#E8F1EC;        /* 冷白 */
  --line:#C9D6D0;         /* 签表线冷白 */
  --warm:#8C8A80;         /* 暖灰 */
  --teal:#2E6E5E;         /* 次级墨青 */
  --coral:#E4685A;        /* 信号珊瑚 · 负向指标 */
  --text:#CFDDD6;
  --unit:8px;
  --gutter:clamp(16px,4vw,40px);
  --maxw:1240px;
  --hdr-h:96px;
  --hair:rgba(201,214,208,.18);
  --hair-strong:rgba(201,214,208,.32);
  --dur:180ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 620px at 84% -12%,rgba(79,240,208,.07),transparent 62%),
    radial-gradient(900px 520px at -6% 2%,rgba(242,160,61,.05),transparent 58%);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,picture,video{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{color:#7CF6DF}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
dl,dd,dt{margin:0}
h1,h2,h3,h4{font-family:var(--font-sans);font-weight:800;color:var(--white);letter-spacing:-.02em;line-height:1.16;margin:0}
h1{font-size:clamp(34px,5.2vw,64px)}
h2{font-size:clamp(23px,3vw,38px)}
h3{font-size:clamp(18px,2vw,22px);letter-spacing:-.01em;line-height:1.3}
h4{font-size:16px;letter-spacing:0;line-height:1.4}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
[id]{scroll-margin-top:calc(var(--hdr-h) + 16px)}
main:focus{outline:none}

/* ---------- 3. 通用排版工具 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.muted{color:var(--warm)}
.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}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:24px;height:1px;background:currentColor}
.rail-note{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--warm);
}
.rule{height:1px;border:0;margin:0;background:var(--hair)}

/* ---------- 4. 骨架与网格 ---------- */
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,48px)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:calc(var(--unit) * 3)}
.split{display:grid;gap:clamp(24px,3vw,48px);align-items:start}
.split--4-8{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.split--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.offset-top{padding-top:calc(var(--hdr-h) + 32px)}
.prose{max-width:68ch}
.prose p{margin-bottom:1.1em}
.prose h2{margin:1.8em 0 .6em}
.prose h3{margin:1.4em 0 .5em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.2em}
.prose li{margin-bottom:.4em}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;
  border:1px solid var(--line);border-radius:2px;
  background:transparent;color:var(--white);
  font-size:14px;font-weight:600;letter-spacing:.04em;line-height:1;
  text-decoration:none;cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn::after{content:"→";font-family:var(--font-mono);font-size:13px;line-height:1}
.btn:hover{transform:translateY(-2px);border-color:var(--cyan);color:var(--cyan)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--cyan);border-color:var(--cyan);color:#06231C}
.btn-primary:hover{background:#7CF6DF;border-color:#7CF6DF;color:#06231C}
.btn-ghost{color:var(--line);border-color:var(--hair-strong)}
.btn-amber{border-color:var(--amber);color:var(--amber)}
.btn-amber:hover{background:rgba(242,160,61,.12);border-color:var(--amber);color:var(--amber)}

/* ---------- 6. 跳转链接与焦点 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;border-radius:2px;
  background:var(--cyan);color:#06231C;
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-160%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0);color:#06231C}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}

/* ---------- 7. 页头 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(15,42,34,.95);
  border-bottom-color:var(--hair-strong);
}
@supports (backdrop-filter:blur(6px)){
  .site-header[data-scrolled="true"]{backdrop-filter:blur(10px)}
}
.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;z-index:2;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:0 50%;
  opacity:0;
  transition:opacity var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] .scroll-progress{opacity:1}

.header-rail{border-bottom:1px solid rgba(201,214,208,.12)}
.rail-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding-block:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
}
.rail-tag{color:var(--cyan)}
.rail-utility{color:var(--warm);letter-spacing:.08em;text-transform:none}

.header-bar{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  align-items:center;
  gap:24px;
  padding-block:14px;
}

.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--white)}
.brand-mark{
  position:relative;flex:none;width:28px;height:28px;
  border:1px solid var(--line);border-radius:2px;
  background:linear-gradient(135deg,rgba(79,240,208,.18),transparent 60%);
}
.brand-mark::before{
  content:"";position:absolute;left:4px;right:4px;top:50%;height:1px;
  background:var(--cyan);transform:translateY(-.5px);
}
.brand-mark::after{
  content:"";position:absolute;top:4px;bottom:4px;right:6px;width:1px;
  background:rgba(232,241,236,.55);
}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;line-height:1.2}
.brand-sub{font-size:10px;letter-spacing:.2em;color:var(--warm);text-transform:uppercase}
.brand:hover .brand-mark{border-color:var(--cyan)}

.site-nav{display:flex;align-items:center;justify-content:flex-end;gap:20px}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 11px;
  color:var(--white);font-size:15px;letter-spacing:.02em;text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(79,240,208,.07)}
.nav-link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan)}
.nav-idx{font-size:10px;color:var(--warm);letter-spacing:.1em}
.nav-link:hover .nav-idx,.nav-link[aria-current="page"] .nav-idx{color:var(--cyan)}
.nav-cta{flex:none}

.nav-toggle{
  display:none;align-items:center;justify-content:center;gap:10px;
  width:auto;min-height:44px;padding:0 12px;
  border:1px solid var(--hair-strong);border-radius:2px;
  background:transparent;color:var(--white);
  font-size:13px;letter-spacing:.1em;cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:currentColor;transition:background-color var(--dur) var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform var(--dur) 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)}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,9vw,128px);
  background:var(--pitch);
  border-top:1px solid var(--hair-strong);
  color:var(--white);
  padding-bottom:32px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,56px);
  padding-block:clamp(40px,5vw,64px) 36px;
}
.footer-brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.brand--footer{align-items:flex-start}
.footer-lede{margin:0;font-size:15px;line-height:1.7;color:var(--line);max-width:34ch}
.footer-meta{margin:0;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--warm)}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.footer-col-title{
  font-size:11px;font-family:var(--font-mono);font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--warm);
  padding-bottom:10px;margin-bottom:12px;border-bottom:1px solid var(--hair);
}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.footer-link{
  display:inline-block;color:var(--line);font-size:15px;text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{
  padding-block:28px 24px;
  border-top:1px solid var(--hair);
}
.contact-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px 32px}
.contact-row{display:flex;gap:10px;align-items:baseline;font-size:14px;color:var(--line)}
.contact-row dt{flex:none;min-width:44px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--warm)}
.contact-row dd{color:var(--line)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  padding-top:20px;border-top:1px solid var(--hair);
  font-size:12px;color:var(--warm);
}
.footer-bottom p{margin:0}
.footer-legal{letter-spacing:.08em}
.footer-note{flex:1 1 320px;max-width:60ch;line-height:1.6}
.footer-copy{letter-spacing:.08em}

/* ---------- 9. 面包屑与页内导航 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--warm);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:rgba(201,214,208,.35)}
.breadcrumbs a{color:var(--line)}
.breadcrumbs a:hover{color:var(--cyan)}
.jump-nav{
  display:flex;flex-wrap:wrap;gap:6px;
  padding:12px 0;border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);
}
.jump-nav a{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:7px 11px;border:1px solid transparent;border-radius:2px;color:var(--line);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.jump-nav a:hover{color:var(--cyan);border-color:rgba(79,240,208,.5)}
.jump-nav a.is-active{color:var(--cyan);border-color:rgba(79,240,208,.5);background:rgba(79,240,208,.08)}

/* ---------- 10. 面板、标签与数据 ---------- */
.panel{
  background:var(--panel);
  border:1px solid var(--hair);
  border-radius:2px;
  padding:clamp(18px,2vw,26px);
}
.panel--flat{background:rgba(23,53,43,.55)}
.panel--cyan{border-left:3px solid var(--cyan)}
.panel--amber{border-left:3px solid var(--amber)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 8px;border:1px solid var(--hair-strong);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--line);
}
.tag--live{color:var(--cyan);border-color:rgba(79,240,208,.5);background:rgba(79,240,208,.08)}
.tag--done{color:var(--warm);border-color:rgba(140,138,128,.42)}
.tag--pending{color:var(--line);border-style:dashed}
.tag--alert{color:var(--coral);border-color:rgba(228,104,90,.5);background:rgba(228,104,90,.08)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(20px,2.4vw,30px);letter-spacing:.08em;color:var(--white)}
.stat-label{font-size:13px;color:var(--warm)}
.stat--cyan .stat-value{color:var(--cyan)}
.stat--amber .stat-value{color:var(--amber)}
.stat--coral .stat-value{color:var(--coral)}

.data-strip{display:grid;gap:8px}
.data-strip-bar{position:relative;height:6px;background:rgba(201,214,208,.12);border-radius:2px;overflow:hidden}
.data-strip-fill{position:absolute;inset:0 auto 0 0;width:var(--value,50%);background:var(--cyan);border-radius:2px}
.data-strip-fill--cyan{background:var(--cyan)}
.data-strip-fill--amber{background:var(--amber)}
.data-strip-fill--coral{background:var(--coral)}

.index-list{list-style:none;border-top:1px solid var(--hair)}
.index-list > li{border-bottom:1px solid var(--hair)}
.index-item{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:16px;align-items:baseline;
  padding:15px 0;color:var(--white);text-decoration:none;
  transition:background-color var(--dur) var(--ease),padding-inline var(--dur) var(--ease);
}
.index-item:hover{background:rgba(79,240,208,.06);color:var(--white);padding-inline:10px}
.index-item .idx{font-family:var(--font-mono);font-size:12px;color:var(--warm);letter-spacing:.1em}
.index-item .idx-title{font-size:16px;font-weight:600}
.index-item .idx-meta{font-family:var(--font-mono);font-size:12px;color:var(--warm);letter-spacing:.06em}

/* ---------- 11. 折叠问答 ---------- */
.qa{border-bottom:1px solid var(--hair)}
.qa summary{
  display:flex;align-items:baseline;gap:12px;
  padding:16px 0;cursor:pointer;list-style:none;
  color:var(--white);font-weight:600;font-size:16px;
  transition:color var(--dur) var(--ease);
}
.qa summary::-webkit-details-marker{display:none}
.qa summary::before{content:"+";font-family:var(--font-mono);color:var(--cyan);width:14px;flex:none}
.qa[open] summary::before{content:"–"}
.qa summary:hover{color:var(--cyan)}
.qa-body{padding:0 0 18px 26px;font-size:16px;line-height:1.75;color:var(--text);max-width:74ch}

/* ---------- 12. 图片容器基础 ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  overflow:hidden;border:1px solid var(--hair);border-radius:2px;
  background:var(--panel);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(201,214,208,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,214,208,.09) 1px,transparent 1px);
  background-size:32px 32px;
}
.media-frame > img,.media-frame > svg,.media-frame > picture > img{
  width:100%;height:100%;object-fit:cover;
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--3x4{aspect-ratio:3/4}
.media-frame--tall{aspect-ratio:2/3}
.figure-cap{
  margin-top:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--warm);
}

/* ---------- 13. 入场动效 ---------- */
.js-ready [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity 280ms var(--ease),transform 280ms var(--ease);
}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1180px){
  .nav-cta{display:none}
  .nav-link{padding:10px 9px;font-size:14px}
}
@media (max-width:980px){
  :root{--hdr-h:64px}
  .header-rail{display:none}
  .header-bar{grid-template-columns:minmax(0,1fr) auto;gap:12px;padding-block:12px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;left:0;right:0;top:var(--hdr-h);
    display:grid;justify-items:stretch;
    padding:8px var(--gutter) 24px;
    background:var(--pitch);
    border-bottom:1px solid var(--hair-strong);
    max-height:0;opacity:0;visibility:hidden;overflow:auto;
    transition:max-height 260ms var(--ease),opacity 200ms var(--ease),visibility 0s linear 260ms;
  }
  .site-nav[data-open="true"]{
    max-height:min(78vh,640px);opacity:1;visibility:visible;
    transition:max-height 280ms var(--ease),opacity 200ms var(--ease),visibility 0s linear 0s;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    padding:15px 0;font-size:17px;
    border-bottom:1px solid var(--hair);border-left:2px solid transparent;
    padding-left:12px;
  }
  .nav-link[aria-current="page"]{border-bottom-color:var(--hair);border-left-color:var(--cyan);background:rgba(79,240,208,.06)}
  .nav-cta{display:inline-flex;justify-content:center;margin-top:20px;width:100%}
  .split--4-8,.split--5-7,.footer-top{grid-template-columns:1fr}
  .grid-12{gap:16px}
  .footer-cols{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
}
@media (max-width:640px){
  body{font-size:16px}
  .footer-cols{grid-template-columns:1fr 1fr}
  .contact-list{grid-template-columns:1fr}
  .index-item{grid-template-columns:auto minmax(0,1fr);gap:12px}
  .index-item .idx-meta{grid-column:2}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-note{max-width:none}
}
@media (max-width:420px){
  .footer-cols{grid-template-columns:1fr}
}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .footer-link:hover{transform:none}
  .index-item:hover{padding-inline:0}
  .nav-toggle-bars::before,.nav-toggle-bars::after{transition:none}
}