/* XBET 国际站 · 共享样式 /assets/site.css */
:root{
  --ink:#0A1A2A;
  --ink-deep:#07131F;
  --night:#12283C;
  --line:#1F3B54;
  --orange:#FF6A2B;
  --orange-soft:#FFB48C;
  --cyan:#35E8D2;
  --cream:#F3EBDD;
  --paper-ink:#151009;
  --mist:#A9BECD;
  --mist-dim:#6E8AA0;
  --amber:#FFD166;
  --font-display:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --max:1240px;
  --gutter:64px;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-pill:999px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
strong{color:var(--cream);font-weight:700}
::selection{background:var(--orange);color:#12060A}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
#main-content:focus-visible{outline:2px solid var(--cyan);outline-offset:-2px}

/* ---------- 排版 ---------- */
.h1,.h2,.h3{font-family:var(--font-display);color:var(--cream);font-weight:800;letter-spacing:-.02em;line-height:1.15}
.h1{font-size:clamp(34px,5vw,52px)}
.h2{font-size:clamp(24px,3vw,30px);line-height:1.25}
.h3{font-size:clamp(18px,2vw,21px);line-height:1.4}
.lede{font-size:clamp(16px,1.4vw,18px);line-height:1.8;color:var(--mist);max-width:36em}
.mono{font-family:var(--font-mono);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--cyan);line-height:1.4;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.65}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(48px,7vw,96px)}
.grid{display:grid;gap:24px}
.grid--12{display:grid;gap:24px;grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--12 > *{grid-column:span 12}
@media (min-width:920px){
  .span-4{grid-column:span 4}
  .span-5{grid-column:span 5}
  .span-6{grid-column:span 6}
  .span-7{grid-column:span 7}
  .span-8{grid-column:span 8}
}

/* ---------- 面板与标签 ---------- */
.panel{
  background:var(--night);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,32px);
}
.panel--paper{
  background:var(--cream);
  color:var(--paper-ink);
  border-color:rgba(21,16,9,.16);
}
.panel--paper .h1,.panel--paper .h2,.panel--paper .h3{color:var(--paper-ink)}
.panel--paper .lede{color:#4A4034}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--mist);line-height:1.4;white-space:nowrap;
}
.chip--orange{border-color:rgba(255,106,43,.5);background:rgba(255,106,43,.12);color:var(--orange-soft)}
.chip--cyan{border-color:rgba(53,232,210,.45);background:rgba(53,232,210,.1);color:var(--cyan)}
.chip--amber{border-color:rgba(255,209,102,.45);background:rgba(255,209,102,.12);color:var(--amber)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;line-height:1.2;
  border:1px solid transparent;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);color:#160A04;box-shadow:0 10px 26px -14px rgba(255,106,43,.95)}
.btn--primary:hover{background:var(--orange-soft)}
.btn--outline{color:var(--orange);border-color:rgba(255,106,43,.55);background:rgba(255,106,43,.07)}
.btn--outline:hover{background:var(--orange);color:#160A04;border-color:var(--orange)}
.btn--ghost{color:var(--cream);border-color:var(--line);background:rgba(255,255,255,.03)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--cyan{background:var(--cyan);color:#04171A}
.btn--cyan:hover{background:#7BF2E4}

/* ---------- 图片容器（页面阶段放置图片） ---------- */
.media{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:linear-gradient(160deg,var(--night) 0%,var(--ink) 100%);
}
.media img,.media picture img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--band{aspect-ratio:21/9}
.media-placeholder{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:rgba(169,190,205,.55);
  background-image:linear-gradient(rgba(53,232,210,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(53,232,210,.07) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
}
.media-caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist-dim)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:18px;font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--mist-dim)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumbs li{display:inline-flex;align-items:center;gap:6px}
.breadcrumbs li + li::before{content:"/";color:var(--line)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--cream)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:var(--cyan);color:#04171A;font-size:14px;font-weight:700;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus-visible{transform:none}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,26,42,.95);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.header-inner{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}

.header-rail{
  display:flex;align-items:center;gap:12px;
  padding:10px 0;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--mist-dim);
}
.rail-mark{width:8px;height:8px;border-radius:2px;background:var(--cyan);box-shadow:0 0 12px rgba(53,232,210,.8);flex:none}
.rail-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rail-spacer{flex:1}

.version-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 12px;border-radius:var(--radius-pill);
  border:1px solid rgba(53,232,210,.38);
  background:rgba(53,232,210,.08);
  font-family:var(--font-mono);line-height:1.5;white-space:nowrap;
}
.version-label{font-size:10px;letter-spacing:.18em;color:var(--mist-dim);text-transform:uppercase}
.version-num{font-size:12px;letter-spacing:.08em;color:var(--cyan);font-weight:700}

.header-masthead{position:relative;text-align:center;padding:24px 0 16px}
.brand{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(28px,4.4vw,46px);
  line-height:1.1;
  letter-spacing:-.03em;
  color:var(--cream);
}
.brand::after{
  content:"";display:block;width:34px;height:3px;border-radius:2px;
  background:var(--orange);margin:10px auto 0;
}
.brand:hover{color:#fff}
.brand-tagline{
  margin-top:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.34em;
  color:var(--mist-dim);
}

.header-bar{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:20px;padding:2px 0 14px;
  border-top:1px solid var(--line);
  padding-top:10px;
}
.primary-nav{grid-column:2;justify-self:center}
.nav-list{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;display:inline-block;
  padding:6px 2px;
  font-size:15px;letter-spacing:.02em;color:var(--mist);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--orange);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .24s ease,background-color .24s ease;
}
.nav-link:hover{color:var(--cream)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cream);font-weight:600}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan)}

.header-tools{grid-column:3;justify-self:end}
.header-cta{font-size:14px;padding:10px 20px}

.nav-toggle{
  grid-column:1;justify-self:start;
  display:none;align-items:center;gap:10px;
  min-height:44px;padding:10px 16px;
  border-radius:var(--radius-pill);border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--cream);font-size:13px;letter-spacing:.08em;
}
.nav-toggle:hover{border-color:rgba(53,232,210,.5)}
.nav-toggle-bars{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--cream);
  box-shadow:0 6px 0 var(--cream),0 -6px 0 var(--cream);
  transition:background-color .2s ease,box-shadow .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{
  background:var(--orange);box-shadow:0 6px 0 var(--orange),0 -6px 0 var(--orange);
}
.nav-toggle-text{line-height:1}

.site-header{box-shadow:0 1px 0 rgba(31,59,84,.9)}

/* ---------- 阅读进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:90;
  background:linear-gradient(90deg,var(--orange),var(--cyan));
  transform:scaleX(0);transform-origin:left center;
  pointer-events:none;
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-deep);border-top:1px solid var(--line);color:var(--mist)}
.footer-inner{width:100%;max-width:var(--max);margin-inline:auto;padding:clamp(40px,6vw,64px) var(--gutter) 26px}
.footer-top{display:grid;grid-template-columns:1.05fr 2fr;gap:48px}
.footer-brand{min-width:0}
.brand--footer{font-size:26px;letter-spacing:-.02em}
.brand--footer::after{width:26px;height:2px;margin-left:0;margin-right:auto}
.footer-note{margin-top:14px;font-size:13px;line-height:1.8;color:var(--mist-dim);max-width:26em}
.version-badge--footer{margin-top:16px}
.footer-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}
.footer-col-title{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:14px;
}
.footer-list li + li{margin-top:10px}
.footer-link{font-size:14px;color:var(--mist);transition:color .2s ease}
.footer-link:hover{color:var(--cream)}
.footer-contact{
  display:flex;flex-wrap:wrap;gap:14px 36px;
  margin-top:40px;padding-top:24px;
  border-top:1px solid var(--line);
}
.contact-item{display:flex;flex-direction:column;gap:4px;min-width:0;max-width:100%}
.contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--mist-dim)}
.contact-value{font-size:14px;color:var(--cream);line-height:1.6;word-break:break-word}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  margin-top:22px;padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist-dim);
}
.footer-legal{margin:0}

/* ---------- 滚动显现 ---------- */
html[data-reveal="on"] [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .32s ease,transform .32s ease;
  transition-delay:var(--reveal-delay,0ms);
}
html[data-reveal="on"] [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  :root{--gutter:40px}
  .nav-list{gap:18px}
  .nav-link{font-size:14px}
}

@media (max-width:920px){
  :root{--gutter:20px}
  .header-rail{letter-spacing:.14em}
  .header-masthead{padding:18px 0 14px}
  .header-bar{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:12px;
  }
  .nav-toggle{display:inline-flex;order:1}
  .header-tools{order:2;margin-left:auto}
  .primary-nav{
    order:3;flex:1 0 100%;display:none;
    border-top:1px solid var(--line);
    margin-top:10px;padding-top:6px;
  }
  .primary-nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{width:100%}
  .nav-link{
    display:block;padding:12px 4px;
    border-bottom:1px solid var(--line);
    font-size:16px;
  }
  .nav-link::after{left:4px;right:auto;width:24px;bottom:6px}
  .footer-top{grid-template-columns:1fr;gap:34px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 20px}
}

@media (max-width:520px){
  body{font-size:16px}
  .rail-text{font-size:10px;letter-spacing:.12em}
  .version-label{display:none}
  .header-cta{padding:9px 15px;font-size:13px}
  .footer-nav{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html[data-reveal="on"] [data-reveal]{opacity:1;transform:none}
  .scroll-progress{transition:none}
  .skip-link{transition:none}
}