/* ==========================================================
   速搏赛场 · 共享站点套件 /assets/site.css
   1 重置  2 变量  3 基础排版  4 头部  5 页脚
   6 通用组件  7 响应式  8 动效降级
   ========================================================== */

/* 1. 重置 ------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--sb-topbar-h) + 20px)}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{width:100%;border-collapse:collapse}
:where(a,button,summary,[tabindex]):focus-visible{outline:3px solid var(--sb-lime);outline-offset:3px;border-radius:1px}

/* 2. 变量 ------------------------------------------------ */
:root{
  --sb-deep:#071A13;
  --sb-panel:#102A20;
  --sb-moss:#365244;
  --sb-stone:#6B746D;
  --sb-warm:#F4EFE3;
  --sb-sand:#DDD3BE;
  --sb-lime:#9BE64F;
  --sb-amber:#F2A33B;
  --sb-clay:#B46A45;
  --sb-black:#030B08;

  --sb-rail-w:248px;
  --sb-topbar-h:46px;

  --sb-font-head:"Helvetica Neue","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --sb-font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --sb-font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --sb-border:2px solid var(--sb-moss);
  --sb-shadow:6px 6px 0 var(--sb-black);
}

/* 3. 基础排版 -------------------------------------------- */
body{
  min-height:100vh;
  background:var(--sb-deep);
  color:var(--sb-warm);
  font-family:var(--sb-font-body);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--sb-font-head);font-weight:400;line-height:1.1;letter-spacing:-.01em}
strong{font-weight:700;color:var(--sb-warm)}
::selection{background:var(--sb-lime);color:var(--sb-deep)}

/* 4. 头部（框架式导航 / 移动抽屉） ------------------------ */
.sb-skip{
  position:fixed;left:14px;top:-140px;z-index:300;
  padding:10px 18px;
  background:var(--sb-lime);color:var(--sb-deep);
  font-family:var(--sb-font-head);font-weight:700;font-size:13px;letter-spacing:.06em;
  border:2px solid var(--sb-black);box-shadow:4px 4px 0 var(--sb-black);
  transition:top .18s ease;
}
.sb-skip:focus{top:12px}

.sb-header{
  position:sticky;top:0;z-index:60;
  background:var(--sb-deep);
  border-bottom:3px solid var(--sb-black);
  color:var(--sb-warm);
}

/* 顶部读数条 */
.sb-topbar{
  position:relative;
  display:block;
  height:3px;
  background:var(--sb-black);
}
.sb-topbar__index,.sb-topbar__util{display:none}
.sb-topbar__label{font-family:var(--sb-font-mono);font-size:12px;letter-spacing:.1em;color:var(--sb-warm)}
.sb-topbar__util{font-family:var(--sb-font-mono);font-size:11px;letter-spacing:.08em;color:var(--sb-stone)}
.sb-progress{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:rgba(244,239,227,.08);overflow:hidden;
}
.sb-progress__bar{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,var(--sb-lime),var(--sb-amber));
  transition:width .08s linear;
}

/* 机架 */
.sb-rail{display:flex;flex-direction:column}
.sb-rail__head{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 18px;
  border-bottom:1px solid var(--sb-moss);
}
.sb-rail__body{
  max-height:0;opacity:0;visibility:hidden;overflow:hidden;
  transition:max-height .3s ease,opacity .22s ease,visibility .22s ease;
}
.sb-header[data-open] .sb-rail__body{
  max-height:min(70vh,520px);opacity:1;visibility:visible;overflow-y:auto;
}

/* 品牌 */
.sb-brand{display:flex;align-items:center;gap:11px}
.sb-brand__mark{
  display:grid;place-items:center;
  width:38px;height:38px;flex:0 0 auto;
  background:var(--sb-lime);color:var(--sb-deep);
  font-family:var(--sb-font-mono);font-size:13px;font-weight:700;letter-spacing:.04em;
  border:2px solid var(--sb-black);box-shadow:3px 3px 0 var(--sb-black);
}
.sb-brand__text{display:block}
.sb-brand__name{
  display:block;
  font-family:var(--sb-font-head);font-size:18px;font-weight:800;
  letter-spacing:.08em;line-height:1.2;color:var(--sb-warm);
}
.sb-brand__tag{
  display:block;
  font-family:var(--sb-font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--sb-stone);line-height:1.5;
}

/* 抽屉按钮 */
.sb-navtoggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 12px;
  background:var(--sb-panel);color:var(--sb-warm);
  border:2px solid var(--sb-moss);
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  transition:border-color .18s ease,color .18s ease;
}
.sb-navtoggle:hover{border-color:var(--sb-lime);color:var(--sb-lime)}
.sb-navtoggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.sb-navtoggle__bars i{display:block;height:2px;background:var(--sb-lime);transition:transform .22s ease,opacity .18s ease}
.sb-header[data-open] .sb-navtoggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.sb-header[data-open] .sb-navtoggle__bars i:nth-child(2){opacity:0}
.sb-header[data-open] .sb-navtoggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.sb-navtoggle__text{white-space:nowrap}

/* 导航列表 */
.sb-nav{display:block}
.sb-nav__list{display:flex;flex-direction:column;padding:4px 18px 0}
.sb-nav__item{display:block}
.sb-nav__link{
  display:flex;align-items:baseline;gap:12px;
  padding:12px 2px;
  border-bottom:1px solid rgba(54,82,68,.55);
  font-family:var(--sb-font-head);font-size:16px;font-weight:600;letter-spacing:.06em;
  color:var(--sb-sand);
  transition:color .18s ease,padding-inline-start .18s ease;
}
.sb-nav__link:hover{color:var(--sb-lime)}
.sb-nav__num{
  font-family:var(--sb-font-mono);font-size:10.5px;font-weight:400;
  letter-spacing:.14em;color:var(--sb-stone);
}
.sb-nav__link[aria-current="page"]{
  color:var(--sb-lime);
  background:linear-gradient(90deg,rgba(155,230,79,.14),transparent 78%);
  border-bottom-color:var(--sb-lime);
}
.sb-nav__link[aria-current="page"] .sb-nav__num{color:var(--sb-lime)}

/* 机架底部 */
.sb-rail__foot{
  display:grid;gap:12px;
  padding:18px 18px 22px;
  border-top:1px solid rgba(54,82,68,.55);
  margin-top:10px;
}
.sb-rail__note{
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--sb-stone);line-height:1.7;
}
.sb-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 16px;
  background:var(--sb-amber);color:var(--sb-black);
  border:2px solid var(--sb-black);box-shadow:4px 4px 0 var(--sb-black);
  font-family:var(--sb-font-head);font-size:13px;font-weight:700;letter-spacing:.08em;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease;
}
.sb-cta:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--sb-black);background:var(--sb-lime)}
.sb-cta:active{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--sb-black)}

/* 5. 页脚 ------------------------------------------------ */
.sb-footer{
  margin-top:clamp(48px,8vw,96px);
  background:var(--sb-deep);
  border-top:3px solid var(--sb-black);
  color:var(--sb-warm);
}
.sb-footer__masthead{
  padding:clamp(30px,5vw,60px) clamp(18px,4vw,52px) clamp(24px,4vw,42px);
  background:var(--sb-panel);
  border-bottom:2px solid var(--sb-moss);
}
.sb-footer__brand{
  margin-top:14px;
  font-family:var(--sb-font-head);font-weight:200;
  font-size:clamp(40px,8vw,88px);line-height:.92;letter-spacing:-.02em;
  color:var(--sb-warm);
}
.sb-footer__line{
  margin-top:10px;
  font-family:var(--sb-font-mono);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--sb-lime);
}
.sb-footer__summary{
  margin-top:16px;max-width:46ch;
  font-size:14px;line-height:1.8;color:var(--sb-sand);
}
.sb-footer__grid{
  display:grid;gap:0;
  grid-template-columns:1fr;
  border-bottom:2px solid var(--sb-moss);
}
.sb-footer__col{
  padding:clamp(20px,3vw,32px) clamp(18px,4vw,52px);
  border-bottom:1px solid rgba(54,82,68,.55);
}
.sb-footer__coltitle{
  font-family:var(--sb-font-mono);font-size:10.5px;font-weight:400;
  letter-spacing:.2em;text-transform:uppercase;color:var(--sb-stone);
  margin-bottom:14px;
}
.sb-footer__links{display:grid;gap:9px}
.sb-footer__link{
  font-family:var(--sb-font-head);font-size:14px;letter-spacing:.04em;
  color:var(--sb-sand);
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.sb-footer__link:hover{color:var(--sb-lime);border-bottom-color:var(--sb-lime)}
.sb-footer__contact{
  padding:clamp(20px,3vw,32px) clamp(18px,4vw,52px);
  background:rgba(180,106,69,.09);
}
.sb-footer__row{
  display:grid;gap:3px;padding:9px 0;
  border-bottom:1px solid rgba(54,82,68,.55);
}
.sb-footer__row:last-child{border-bottom:0}
.sb-footer__label{
  font-family:var(--sb-font-mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--sb-clay);
}
.sb-footer__value{font-size:13.5px;line-height:1.7;color:var(--sb-warm);word-break:break-word}
.sb-footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px 28px;align-items:center;justify-content:space-between;
  padding:18px clamp(18px,4vw,52px) 26px;
}
.sb-footer__legal{
  padding:3px 9px;
  border:1px solid var(--sb-moss);
  font-size:10.5px;letter-spacing:.12em;color:var(--sb-sand);
}
.sb-footer__meta{
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.1em;color:var(--sb-stone);
}

/* 6. 通用组件 -------------------------------------------- */
.sb-container{
  width:100%;max-width:1180px;margin-inline:auto;
  padding-inline:clamp(18px,4vw,48px);
}
.sb-stack>*+*{margin-top:clamp(16px,2.4vw,26px)}
.sb-divider{height:2px;background:var(--sb-moss);border:0;margin-block:clamp(20px,3vw,36px)}

.sb-grid{display:grid;gap:clamp(14px,2vw,22px)}
.sb-grid--2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.sb-grid--3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.sb-grid--asym{grid-template-columns:1fr;align-items:start}

.sb-index{
  display:inline-block;
  font-family:var(--sb-font-mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--sb-stone);line-height:1.6;
}
.sb-mono{font-family:var(--sb-font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.sb-display{
  font-family:var(--sb-font-head);font-weight:200;
  font-size:clamp(38px,7.5vw,92px);line-height:.94;letter-spacing:-.02em;
  color:var(--sb-warm);
}
.sb-h2{
  font-family:var(--sb-font-head);font-weight:300;
  font-size:clamp(23px,3.2vw,38px);line-height:1.08;letter-spacing:-.01em;
  color:var(--sb-warm);
}
.sb-h3{
  font-family:var(--sb-font-head);font-weight:700;
  font-size:clamp(15px,1.6vw,19px);line-height:1.35;letter-spacing:.04em;
  color:var(--sb-warm);
}
.sb-num{
  display:block;
  font-family:var(--sb-font-mono);font-weight:600;
  font-size:clamp(40px,6.5vw,92px);line-height:1;letter-spacing:-.03em;
  color:var(--sb-lime);font-variant-numeric:tabular-nums;
}

.sb-panel{
  background:var(--sb-panel);
  border:var(--sb-border);
  padding:clamp(18px,3vw,30px);
}
.sb-card{
  background:var(--sb-panel);
  border:var(--sb-border);
  box-shadow:var(--sb-shadow);
  padding:clamp(16px,2.4vw,24px);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.sb-card:hover{transform:translate(-2px,-2px);box-shadow:9px 9px 0 var(--sb-black);border-color:var(--sb-moss)}
.sb-card__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid var(--sb-moss);
}
.sb-card__title{
  font-family:var(--sb-font-head);font-size:14.5px;font-weight:700;letter-spacing:.08em;
  color:var(--sb-warm);
}

.sb-media{
  position:relative;overflow:hidden;
  aspect-ratio:4/3;
  background:var(--sb-panel);
  border:2px solid var(--sb-moss);
}
.sb-media--wide{aspect-ratio:16/9}
.sb-media--tall{aspect-ratio:3/4}
.sb-media img,.sb-media picture{width:100%;height:100%}
.sb-media img{
  object-fit:cover;
  filter:saturate(.72) contrast(1.06) brightness(.88);
  transition:transform .5s ease,filter .5s ease;
}
.sb-media:hover img{transform:scale(1.03);filter:saturate(.92) contrast(1.06) brightness(.96)}
.sb-media__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:22px 12px 10px;
  background:linear-gradient(0deg,rgba(3,11,8,.9),rgba(3,11,8,0));
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.12em;
  color:var(--sb-sand);
}

.sb-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  background:var(--sb-lime);color:var(--sb-deep);
  border:2px solid var(--sb-black);box-shadow:4px 4px 0 var(--sb-black);
  font-family:var(--sb-font-head);font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease;
}
.sb-btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--sb-black)}
.sb-btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--sb-black)}
.sb-btn--ghost{background:transparent;color:var(--sb-warm);border-color:var(--sb-moss);box-shadow:4px 4px 0 var(--sb-black)}
.sb-btn--ghost:hover{border-color:var(--sb-lime);color:var(--sb-lime)}
.sb-btn--amber{background:var(--sb-amber);color:var(--sb-black)}
.sb-btn--amber:hover{background:var(--sb-lime)}

.sb-chiprow{display:flex;flex-wrap:wrap;gap:8px}
.sb-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;
  background:rgba(54,82,68,.28);color:var(--sb-sand);
  border:1px solid var(--sb-moss);
  font-family:var(--sb-font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  transition:border-color .16s ease,color .16s ease,background .16s ease;
}
.sb-chip:hover{border-color:var(--sb-lime);color:var(--sb-warm)}
.sb-chip[aria-pressed="true"],.sb-chip.is-active{
  background:var(--sb-lime);border-color:var(--sb-lime);color:var(--sb-deep);font-weight:700;
}
.sb-tag{
  display:inline-block;padding:3px 8px;
  border:1px solid var(--sb-clay);color:var(--sb-clay);
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
}
.sb-live{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--sb-amber);
}
.sb-live::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--sb-amber);animation:sb-pulse 1.9s ease-in-out infinite;
}
@keyframes sb-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.3;transform:scale(.78)}}

.sb-breadcrumb{
  font-family:var(--sb-font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--sb-stone);
}
.sb-breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.sb-breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.sb-breadcrumb li+li::before{content:"/";color:var(--sb-moss)}
.sb-breadcrumb a{color:var(--sb-sand);transition:color .16s ease}
.sb-breadcrumb a:hover{color:var(--sb-lime)}

.sb-prose{max-width:70ch;font-size:15.5px;line-height:1.85;color:var(--sb-sand)}
.sb-prose h2{
  font-family:var(--sb-font-head);font-weight:700;font-size:clamp(19px,2.1vw,25px);
  color:var(--sb-warm);margin:1.9em 0 .6em;letter-spacing:.01em;
}
.sb-prose h3{
  font-family:var(--sb-font-head);font-weight:700;font-size:16px;letter-spacing:.04em;
  color:var(--sb-warm);margin:1.5em 0 .5em;
}
.sb-prose p{margin:0 0 1em}
.sb-prose ul{margin:0 0 1em}
.sb-prose li{position:relative;padding-left:18px;margin-bottom:.45em}
.sb-prose li::before{
  content:"";position:absolute;left:0;top:.78em;width:7px;height:2px;background:var(--sb-lime);
}
.sb-prose a{color:var(--sb-lime);border-bottom:1px solid currentColor}
.sb-prose strong{color:var(--sb-warm)}

[data-chapter]{scroll-margin-top:calc(var(--sb-topbar-h) + 24px)}
.sb-chapter{position:relative;transition:background-color .25s ease}
.sb-chapter__label{
  font-family:var(--sb-font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--sb-stone);transition:color .25s ease;
}
.sb-chapter.is-current{background:linear-gradient(90deg,rgba(155,230,79,.08),transparent 62%)}
.sb-chapter.is-current .sb-chapter__label{color:var(--sb-lime)}
.sb-chapter.is-current::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--sb-lime);
}

/* 7. 响应式 ---------------------------------------------- */
@media (min-width:600px){
  .sb-topbar{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    height:auto;min-height:40px;padding:0 20px;
    background:var(--sb-panel);border-bottom:2px solid var(--sb-moss);
  }
  .sb-topbar__index{display:flex;align-items:baseline;gap:10px}
  .sb-progress{height:3px;background:rgba(244,239,227,.1)}
}

@media (min-width:1024px){
  body{padding-left:var(--sb-rail-w);padding-top:var(--sb-topbar-h)}
  .sb-header{
    position:fixed;top:0;left:0;bottom:0;
    width:var(--sb-rail-w);height:100vh;
    display:flex;flex-direction:column;
    border-bottom:0;border-right:3px solid var(--sb-black);
    background:var(--sb-deep);
  }
  .sb-topbar{
    position:fixed;top:0;left:var(--sb-rail-w);right:0;
    height:var(--sb-topbar-h);min-height:0;padding:0 clamp(20px,3vw,42px);
    background:var(--sb-panel);border-bottom:2px solid var(--sb-moss);
    z-index:50;
  }
  .sb-topbar__index,.sb-topbar__util{display:flex}
  .sb-topbar__util{display:block}
  .sb-rail{flex:1 1 auto;min-height:0}
  .sb-rail__head{
    flex-direction:column;align-items:flex-start;gap:16px;
    padding:24px 22px 20px;
    border-bottom:2px solid var(--sb-moss);
  }
  .sb-brand{flex-direction:column;align-items:flex-start;gap:12px}
  .sb-brand__mark{width:44px;height:44px;font-size:14px}
  .sb-brand__name{font-size:21px}
  .sb-rail__body{
    display:flex;flex-direction:column;flex:1 1 auto;min-height:0;
    max-height:none;opacity:1;visibility:visible;overflow:visible;transition:none;
  }
  .sb-navtoggle{display:none}
  .sb-nav__list{padding:16px 0 0}
  .sb-nav__link{
    padding:13px 22px;
    border-bottom:1px solid rgba(54,82,68,.45);
    border-left:3px solid transparent;
    font-size:14.5px;letter-spacing:.08em;
  }
  .sb-nav__link:hover{
    padding-inline-start:26px;background:rgba(54,82,68,.22);
  }
  .sb-nav__link[aria-current="page"]{
    border-left-color:var(--sb-lime);
    background:linear-gradient(90deg,rgba(155,230,79,.18),rgba(155,230,79,0) 90%);
    border-bottom-color:rgba(155,230,79,.45);
  }
  .sb-rail__foot{
    margin-top:auto;padding:18px 22px 26px;
    border-top:2px solid var(--sb-moss);
  }
  .sb-grid--asym{grid-template-columns:minmax(0,.32fr) minmax(0,.68fr);gap:clamp(20px,2.6vw,34px)}
  .sb-footer__grid{grid-template-columns:1.05fr 1fr 1fr 1.35fr}
  .sb-footer__col{border-bottom:0;border-right:1px solid rgba(54,82,68,.4)}
  .sb-footer__contact{border-right:0}
  .sb-footer__masthead{padding-inline:clamp(24px,4vw,52px)}
}

@media (min-width:1440px){
  :root{--sb-rail-w:272px}
}

/* 8. 动效降级 -------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .sb-card:hover,.sb-btn:hover,.sb-cta:hover{transform:none}
  .sb-media:hover img{transform:none}
  .sb-progress__bar{transition:none}
}