/* ==========================================================================
   安博对局 · 共享外壳样式 /assets/site.css
   1 变量与重置 · 2 基础排版 · 3 布局容器 · 4 头部 · 5 页脚 · 6 通用组件 · 7 响应式 · 8 动效降级
   ========================================================================== */

/* ---------- 1. 变量与重置 ---------- */
:root{
  --ink:#070C1A;
  --panel:#0D1730;
  --panel-2:#111F3E;
  --line:#17264A;
  --line-2:#1E3059;
  --white:#EAF2FF;
  --mist:#9DB1D0;
  --cyan:#23E6D5;
  --orange:#FF6A2B;
  --amber:#F2A93B;
  --green:#2BD98A;
  --red:#FF4D6D;
  --rail-w:240px;
  --bar-h:56px;
  --r:3px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-data:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg{display:block;max-width:100%}
table{width:100%;border-collapse:collapse}
main{display:block}

/* ---------- 2. 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    radial-gradient(820px 480px at 84% -12%, rgba(35,230,213,.10), transparent 62%),
    radial-gradient(680px 420px at 2% 2%, rgba(255,106,43,.08), transparent 60%),
    repeating-linear-gradient(90deg, rgba(23,38,74,.30) 0 1px, transparent 1px 96px),
    linear-gradient(180deg,#070C1A 0%, #08101F 46%, #070C1A 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

#main-content{scroll-margin-top:88px}

.display,
.page-title{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.04;
  color:var(--white);
}
.display{font-size:clamp(38px,7.2vw,88px)}
.page-title{font-size:clamp(30px,4.4vw,48px)}

.eyebrow{
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{
  font-size:17px;
  line-height:1.8;
  color:var(--mist);
  max-width:64ch;
}
.mono{font-family:var(--font-data);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--mist)}
.stack{display:grid;gap:16px}
.divider{height:1px;border:0;background:var(--line);margin:32px 0}
.note{
  font-size:14px;
  line-height:1.7;
  color:var(--mist);
  border-left:2px solid var(--amber);
  padding:4px 0 4px 12px;
}
.sr-only{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 3. 布局容器 ---------- */
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 18px}
.section{padding:44px 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 18px;
  padding-bottom:10px;
  margin-bottom:20px;
  border-bottom:1px solid var(--line);
}
.section-head h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(22px,3vw,34px);
  letter-spacing:-.01em;
  line-height:1.15;
}
.page-head{display:grid;gap:12px;padding:34px 0 8px}
.grid{display:grid;gap:14px}
.grid--bento{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ---------- 4. 头部 ---------- */
.skip-link{
  position:fixed;
  top:-72px;
  left:16px;
  z-index:300;
  padding:10px 16px;
  background:var(--cyan);
  color:#04121A;
  font-family:var(--font-data);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  border-radius:var(--r);
  transition:top 160ms var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
}

/* 侧栏 / 移动顶栏 共用 */
.site-rail{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 16px;
  background:rgba(7,12,26,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}

.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  display:inline-block;
  flex:0 0 26px;
  width:26px;
  height:26px;
  border:1px solid var(--line-2);
  border-radius:2px;
  background:
    radial-gradient(circle at 26% 26%, var(--cyan) 0 2.6px, transparent 3.2px),
    radial-gradient(circle at 74% 26%, rgba(234,242,255,.72) 0 2.6px, transparent 3.2px),
    radial-gradient(circle at 26% 74%, rgba(234,242,255,.42) 0 2.6px, transparent 3.2px),
    radial-gradient(circle at 74% 74%, var(--orange) 0 2.6px, transparent 3.2px),
    var(--panel);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:20px;
  letter-spacing:.02em;
  color:var(--white);
  white-space:nowrap;
}
.brand-line{
  font-size:10px;
  letter-spacing:.14em;
  color:var(--mist);
  white-space:nowrap;
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 11px;
  border:1px solid var(--line);
  border-radius:var(--r);
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
  transition:color 160ms var(--ease),border-color 160ms var(--ease);
}
.nav-toggle:hover{color:var(--white);border-color:rgba(35,230,213,.5)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;justify-content:center;gap:3px;width:14px}
.nav-toggle-bars i{display:block;height:2px;background:currentColor;transition:transform 160ms var(--ease),opacity 160ms var(--ease)}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 导航 */
.rail-nav{
  display:none;
  background:var(--panel);
  border-bottom:1px solid var(--line);
}
.site-header[data-open="true"] .rail-nav{display:block}
.nav-list{display:grid;gap:2px;padding:6px 0}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 16px;
  font-size:14px;
  color:var(--mist);
  border-left:2px solid transparent;
  transition:color 160ms var(--ease),background 160ms var(--ease),border-color 160ms var(--ease);
}
.nav-link:hover{color:var(--white);background:rgba(35,230,213,.07);border-left-color:rgba(35,230,213,.45)}
.nav-link[aria-current="page"]{
  color:var(--white);
  border-left-color:var(--cyan);
  background:linear-gradient(90deg, rgba(35,230,213,.16), rgba(35,230,213,0) 88%);
}
.nav-num{font-size:10px;letter-spacing:.14em;color:var(--line-2)}
.nav-link[aria-current="page"] .nav-num,
.nav-link:hover .nav-num{color:var(--cyan)}

/* 侧栏底部工具入口（桌面显示） */
.rail-foot{display:none}

/* 顶部赛区条 */
.site-topbar{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:var(--bar-h);
  padding:8px 16px;
  background:var(--ink);
  border-bottom:1px solid var(--line);
  transition:background 160ms var(--ease),border-color 160ms var(--ease);
}
.zone-strip-label{
  display:none;
  font-size:10px;
  letter-spacing:.2em;
  color:var(--mist);
  white-space:nowrap;
}
.zone-strip{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  padding:2px 0;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.zone-strip::-webkit-scrollbar{display:none}
.zone-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  flex:0 0 auto;
  padding:5px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.05em;
  color:var(--mist);
  white-space:nowrap;
  transition:color 160ms var(--ease),border-color 160ms var(--ease),background 160ms var(--ease);
}
.zone-chip:hover{color:var(--white);border-color:var(--line-2);background:rgba(35,230,213,.06)}
.zone-chip[aria-pressed="true"]{
  color:#04121A;
  background:var(--cyan);
  border-color:var(--cyan);
  font-weight:700;
}
.zone-dot{width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.65}

.topbar-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.top-action{
  display:none;
  align-items:center;
  padding:6px 12px;
  border:1px solid var(--line);
  border-radius:var(--r);
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
  white-space:nowrap;
  transition:color 160ms var(--ease),border-color 160ms var(--ease),background 160ms var(--ease);
}
.top-action:hover{color:var(--white);border-color:rgba(35,230,213,.55);background:rgba(35,230,213,.08)}
.top-action--primary{
  display:inline-flex;
  color:#1A0A00;
  background:var(--orange);
  border-color:var(--orange);
  font-weight:700;
}
.top-action--primary:hover{color:#1A0A00;background:#ff8148;border-color:#ff8148}

.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden}
.scroll-meter-fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:width 120ms linear;
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  margin-top:72px;
  padding:44px 18px 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(13,23,48,.62), rgba(7,12,26,1) 72%);
}
.footer-top{
  display:grid;
  gap:30px;
  max-width:1200px;
  margin:0 auto;
}
.footer-brand{display:grid;gap:8px;align-content:start}
.footer-brand .brand-mark{margin-bottom:2px}
.footer-brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:24px;
  letter-spacing:.02em;
  line-height:1.2;
}
.footer-tag{font-size:14px;color:var(--mist);max-width:34ch}
.footer-stat{
  font-size:11px;
  letter-spacing:.14em;
  color:var(--line-2);
}
.footer-cols{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
}
.footer-col{display:grid;gap:10px;align-content:start}
.footer-col-title{
  font-family:var(--font-data);
  font-size:11px;
  font-weight:400;
  letter-spacing:.2em;
  color:var(--cyan);
}
.footer-list{display:grid;gap:8px}
.footer-link{
  font-size:14px;
  color:var(--mist);
  transition:color 160ms var(--ease);
}
.footer-link:hover{color:var(--white);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--cyan)}

.footer-track{
  position:relative;
  display:flex;
  justify-content:space-between;
  gap:8px;
  max-width:1200px;
  margin:34px auto 0;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.footer-track-node{
  position:relative;
  padding-top:12px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--mist);
}
.footer-track-node::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:6px;
  height:6px;
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(242,169,59,.14);
}

.footer-contact{
  display:grid;
  gap:10px;
  max-width:1200px;
  margin:26px auto 0;
  padding:18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(13,23,48,.55);
}
.footer-contact-row{
  display:flex;
  flex-wrap:wrap;
  gap:4px 14px;
  align-items:baseline;
  font-size:14px;
}
.footer-contact-label{
  flex:0 0 auto;
  min-width:64px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
}
.footer-contact-value{color:var(--white);word-break:break-word}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px 24px;
  max-width:1200px;
  margin:22px auto 0;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-note{font-size:12px;line-height:1.7;color:var(--mist);max-width:60ch}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px;font-size:12px;color:var(--mist)}
.footer-icp{letter-spacing:.08em}
.footer-copy{color:var(--line-2)}

/* ---------- 6. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:var(--r);
  font-family:var(--font-data);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--white);
  background:rgba(13,23,48,.7);
  transition:transform 160ms var(--ease),background 160ms var(--ease),border-color 160ms var(--ease),color 160ms var(--ease);
}
.btn:hover{transform:translateY(-2px);border-color:rgba(35,230,213,.6);background:rgba(35,230,213,.1)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#1A0A00;font-weight:700}
.btn--primary:hover{background:#ff8148;border-color:#ff8148;color:#1A0A00}
.btn--amber{background:transparent;border-color:rgba(242,169,59,.55);color:var(--amber)}
.btn--amber:hover{background:rgba(242,169,59,.12);border-color:var(--amber)}
.btn--ghost{background:transparent}

.card{
  position:relative;
  padding:18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(180deg, rgba(13,23,48,.94), rgba(9,16,34,.94));
  box-shadow:0 1px 0 rgba(234,242,255,.03), 0 18px 40px -34px rgba(0,0,0,.95);
  transition:transform 160ms var(--ease),border-color 160ms var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(35,230,213,.42)}
.card--focus{
  border-color:rgba(35,230,213,.38);
  background:
    linear-gradient(160deg, rgba(35,230,213,.12), rgba(13,23,48,.96) 46%, rgba(9,16,34,.98));
}
.card--focus::before{
  content:"";
  position:absolute;
  inset:0 0 auto;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(35,230,213,0) 72%);
}
.panel{
  padding:18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(13,23,48,.72);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 8px;
  border:1px solid var(--line-2);
  border-radius:2px;
  font-family:var(--font-data);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
  text-transform:uppercase;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
  transition:color 160ms var(--ease),border-color 160ms var(--ease),background 160ms var(--ease);
}
.chip:hover{color:var(--white);border-color:rgba(35,230,213,.5);background:rgba(35,230,213,.08)}

.stat{display:grid;gap:4px}
.stat-value{
  font-family:var(--font-data);
  font-size:clamp(24px,3.4vw,34px);
  font-weight:700;
  line-height:1.1;
  color:var(--white);
}
.stat-value em{font-style:normal;color:var(--cyan)}
.stat-label{font-size:12px;letter-spacing:.12em;color:var(--mist)}

.data-table{
  border:1px solid var(--line);
  border-radius:var(--r);
  overflow:hidden;
  font-family:var(--font-data);
  font-size:13px;
}
.data-table caption{
  padding:10px 12px;
  text-align:left;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
  background:rgba(13,23,48,.9);
  border-bottom:1px solid var(--line);
}
.data-table th,
.data-table td{
  padding:10px 12px;
  text-align:left;
  border-bottom:1px solid rgba(23,38,74,.72);
  vertical-align:top;
}
.data-table thead th{
  font-size:11px;
  font-weight:400;
  letter-spacing:.14em;
  color:var(--mist);
  background:rgba(13,23,48,.9);
  white-space:nowrap;
}
.data-table tbody tr{transition:background 160ms var(--ease)}
.data-table tbody tr:hover{background:rgba(35,230,213,.07)}
.data-table tbody tr:last-child td{border-bottom:0}

.media-frame{
  position:relative;
  display:block;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:
    radial-gradient(circle at 28% 30%, rgba(35,230,213,.16), transparent 56%),
    radial-gradient(circle at 74% 70%, rgba(242,169,59,.14), transparent 56%),
    var(--panel);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-fallback{
  display:grid;
  place-items:center;
  width:100%;
  height:100%;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--mist);
  text-align:center;
  padding:12px;
}

.breadcrumb{padding:16px 0 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-family:var(--font-data);font-size:11px;letter-spacing:.1em;color:var(--mist)}
.breadcrumb-list li{display:flex;align-items:center;gap:6px}
.breadcrumb-list li + li::before{content:"/";color:var(--line-2)}
.breadcrumb-link{color:var(--mist);transition:color 160ms var(--ease)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--white)}

/* ---------- 7. 响应式 ---------- */
@media (min-width:480px){
  .zone-strip-label{display:inline-block}
}

@media (min-width:720px){
  .top-action{display:inline-flex}
  .wrap{padding:0 26px}
  .section{padding:56px 0}
  .footer-contact{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px 18px}
}

@media (min-width:900px){
  .footer-top{grid-template-columns:minmax(240px,1fr) 1.8fr;gap:40px}
  .site-footer{padding:56px 26px 30px}
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}

  .site-rail{
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    width:var(--rail-w);
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:18px 16px 20px;
    border-right:1px solid var(--line);
    border-bottom:0;
    background:linear-gradient(180deg,#0A1122 0%, #070C1A 62%);
    backdrop-filter:none;
    z-index:120;
  }
  .brand{padding-bottom:16px;border-bottom:1px solid var(--line)}
  .brand-name{font-size:22px}
  .nav-toggle{display:none}
  .rail-nav{
    display:block;
    margin-top:16px;
    background:transparent;
    border-bottom:0;
  }
  .nav-list{padding:0;gap:2px}
  .nav-link{padding:9px 10px;font-size:14px;border-radius:0 var(--r) var(--r) 0}
  .rail-foot{
    display:grid;
    gap:8px;
    margin-top:auto;
    padding-top:16px;
    border-top:1px solid var(--line);
  }
  .rail-foot-label{
    font-size:10px;
    letter-spacing:.18em;
    color:var(--line-2);
    margin-bottom:2px;
  }
  .rail-link{
    font-size:12px;
    letter-spacing:.06em;
    color:var(--mist);
    padding:3px 0;
    transition:color 160ms var(--ease),transform 160ms var(--ease);
  }
  .rail-link:hover{color:var(--cyan);transform:translateX(2px)}

  .site-topbar{
    padding:10px 34px;
    background:rgba(7,12,26,0);
    border-bottom-color:transparent;
  }
  .site-header[data-scrolled="true"] .site-topbar{
    background:rgba(9,15,31,.96);
    border-bottom-color:var(--line);
    backdrop-filter:blur(12px);
  }
  .zone-strip{padding:2px 0}
  .wrap{padding:0 34px}
  .section{padding:64px 0}
  .page-head{padding:44px 0 10px}
  .site-footer{padding:64px 34px 34px}
  .footer-bottom{flex-wrap:nowrap;align-items:center}
}

@media (min-width:1280px){
  .wrap{padding:0 40px}
  .site-topbar{padding:10px 40px}
  .site-footer{padding:68px 40px 36px}
}

/* ---------- 8. 焦点与动效降级 ---------- */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:2px;
}
.skip-link:focus-visible{outline:2px solid var(--white);outline-offset:2px}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .card:hover,
  .btn:hover,
  .rail-link:hover{transform:none}
}