/* ==========================================================================
   F88赛事 · 共享样式表  /assets/site.css
   赛场夜黑底 · 纸张叠层面板 · 荧光绿唯一锚点
   ========================================================================== */

/* 1. 变量
   ========================================================================== */
:root{
  --black:#07090D;
  --panel:#12161D;
  --layer:#1B2230;
  --stroke:#2E3644;
  --white:#EDF1F7;
  --muted:#98A4B4;
  --green:#35F08A;
  --violet:#7B5CFF;
  --orange:#FF8A3C;
  --pitch:#0E2A22;

  --font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;

  --header-h:64px;
  --gutter:clamp(18px,4vw,56px);
  --maxw:1440px;
}
@media (min-width:1024px){ :root{ --header-h:76px; } }

/* 2. Reset
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dd,dt,figure,blockquote{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}

/* 3. 基础排版
   ========================================================================== */
body{
  background:var(--black);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  padding-top:var(--header-h);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.08;letter-spacing:-0.02em}
h1{font-size:clamp(34px,5.4vw,72px);line-height:1.02;letter-spacing:-0.03em}
h2{font-size:clamp(26px,3.6vw,46px)}
h3{font-size:clamp(20px,2.4vw,30px);letter-spacing:-0.01em}
h4{font-size:17px;font-weight:800;letter-spacing:0}
p{text-wrap:pretty}

.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,112px);
  line-height:.98;
  letter-spacing:-0.03em;
}
.num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:-0.01em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--muted);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--green);flex:0 0 auto}
.v-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--muted);
}
.rule{height:1px;border:0;background:var(--stroke);margin:0}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* 4. 布局容器与网格
   ========================================================================== */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(48px,8vw,110px)}
.grid{display:grid;gap:clamp(16px,2vw,28px)}
@media (min-width:900px){
  .grid{gap:clamp(20px,2.4vw,34px)}
  .grid--4-8{grid-template-columns:4fr 8fr}
  .grid--5-7{grid-template-columns:5fr 7fr}
  .grid--3-9{grid-template-columns:3fr 9fr}
  .grid--2{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(3,1fr)}
  .grid--4{grid-template-columns:repeat(4,1fr)}
}

/* 5. 面板 · 标签 · 印刷框线
   ========================================================================== */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--stroke);
  padding:clamp(20px,3vw,38px);
}
.panel--stack{
  box-shadow:10px 10px 0 -2px #0A0D12, 10px 10px 0 -1px var(--stroke);
}
.panel--pitch{background:linear-gradient(160deg,var(--pitch) 0%,var(--panel) 78%)}
.panel--flush{padding:0;overflow:hidden}
.panel__label{
  position:absolute;
  top:clamp(14px,2vw,22px);
  right:clamp(14px,2vw,22px);
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--muted);
  text-transform:uppercase;
}
.panel__label::before{content:"";width:14px;height:2px;background:var(--green)}
.panel__index{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(26px,3.6vw,52px);
  line-height:1;
  color:var(--violet);
  letter-spacing:-0.03em;
}

/* 6. 按钮
   ========================================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--stroke);
  background:var(--layer);
  color:var(--white);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
  transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn:hover{border-color:var(--green);color:var(--green)}
.btn--primary{background:var(--green);border-color:var(--green);color:#04160C}
.btn--primary:hover{background:#5CFFA5;border-color:#5CFFA5;color:#04160C}
.btn--ghost{background:transparent}
.btn--ghost:hover{background:rgba(53,240,138,.08)}

/* 7. 图片容器（页面阶段放置图片）
   ========================================================================== */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--stroke);
  background:linear-gradient(155deg,#141A24 0%,#07090D 74%);
  aspect-ratio:16/9;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:contrast(1.06) saturate(.94) brightness(.92);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,9,13,0) 42%,rgba(7,9,13,.86) 100%);
  pointer-events:none;
  z-index:1;
}
.media--flat::after{content:none}
.media__cap{
  position:absolute;
  left:14px;
  bottom:12px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* 8. 面包屑与正文
   ========================================================================== */
.breadcrumb{padding-block:18px 0}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item + .breadcrumb__item::before{content:"/";margin-right:10px;color:var(--stroke)}
.breadcrumb__link:hover{color:var(--green)}
.prose{max-width:36em;color:#C9D2DE;font-size:17px;line-height:1.8}
.prose p + p{margin-top:1.1em}
.prose strong{color:var(--white)}
.prose a{color:var(--green);border-bottom:1px solid rgba(53,240,138,.4)}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.5em;color:var(--white)}

/* 9. 章节索引（页面右侧纵向）
   ========================================================================== */
.section-index{display:none}
@media (min-width:1280px){
  .section-index{
    display:block;
    position:sticky;
    top:calc(var(--header-h) + 32px);
    border-left:1px solid var(--stroke);
    padding-left:16px;
  }
}
.section-index__list{display:flex;flex-direction:column;gap:12px}
.section-index__link{
  display:block;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--muted);
  transition:color .2s ease-out,padding-left .2s ease-out;
}
.section-index__link:hover{color:var(--white)}
.section-index__link[aria-current="true"]{color:var(--green);padding-left:6px}

/* 10. 入场动画协议
   ========================================================================== */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .3s ease-out,transform .3s ease-out;
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* 11. 跳转链接
   ========================================================================== */
.skip-link{
  position:fixed;
  top:0;
  left:50%;
  transform:translate(-50%,-130%);
  z-index:200;
  padding:11px 20px;
  background:var(--green);
  color:#04160C;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  transition:transform .22s ease-out;
}
.skip-link:focus{transform:translate(-50%,0)}

/* 12. 站点头部
   ========================================================================== */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  color:var(--white);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s ease-out,border-color .3s ease-out;
}
.site-header[data-scrolled="true"],
.site-header[data-nav-open="true"]{
  background:rgba(7,9,13,.94);
  border-bottom-color:var(--stroke);
  backdrop-filter:blur(10px) saturate(1.2);
  -webkit-backdrop-filter:blur(10px) saturate(1.2);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:var(--header-h);
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  width:38px;
  height:38px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  background:var(--green);
  color:#04160C;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:-0.04em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.12}
.brand__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:900;
  letter-spacing:.02em;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--muted);
}

/* 导航 */
.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px)}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.08em;
  color:rgba(237,241,247,.76);
  transition:color .18s ease-out;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:2px;
  right:2px;
  bottom:0;
  height:2px;
  background:var(--green);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease-out;
}
.site-nav__link:hover{color:var(--white)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--green)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* 头部右端：当前章节 + CTA */
.header-status{
  display:none;
  margin-left:clamp(12px,2vw,28px);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
  opacity:0;
  transition:opacity .25s ease-out;
}
@media (min-width:1200px){.header-status{display:inline-block}}
.site-header[data-scrolled="true"] .header-status{opacity:1}
.header-cta{margin-left:auto;padding:10px 18px;font-size:13px}
.site-nav + .header-cta{margin-left:clamp(12px,2vw,28px)}
@media (max-width:559px){.header-cta{display:none}}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  flex:0 0 auto;
  align-items:center;
  justify-content:center;
  border:1px solid var(--stroke);
  background:rgba(18,22,29,.6);
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:20px;
  height:2px;
  background:var(--white);
  transition:background .2s ease-out;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  background:var(--white);
  transition:transform .25s ease-out;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-nav-open="true"] .nav-toggle{border-color:var(--green)}
.site-header[data-nav-open="true"] .nav-toggle__bars{background:transparent}
.site-header[data-nav-open="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);background:var(--green)}
.site-header[data-nav-open="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--green)}

/* 阅读进度条 */
.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  pointer-events:none;
  background:rgba(46,54,68,.5);
}
.header-progress__bar{
  display:block;
  height:100%;
  width:100%;
  background:var(--green);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .08s linear;
}

/* 移动端导航面板 */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    top:0;
    left:0;
    right:0;
    z-index:90;
    margin:0;
    padding:calc(var(--header-h) + 20px) var(--gutter) 40px;
    background:linear-gradient(180deg,#0B1017 0%,#07090D 100%);
    border-bottom:1px solid var(--stroke);
    max-height:100vh;
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
    transform:translateY(-102%);
    visibility:hidden;
    transition:transform .36s cubic-bezier(.22,.85,.28,1),visibility .36s linear;
  }
  .site-nav[data-open="true"]{transform:translateY(0);visibility:visible}
  .site-nav[data-open="false"]{transform:translateY(-102%);visibility:hidden}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-top:1px solid rgba(46,54,68,.7)}
  .site-nav__item:last-child{border-bottom:1px solid rgba(46,54,68,.7)}
  .site-nav__link{
    display:flex;
    align-items:baseline;
    gap:14px;
    padding:16px 0;
    font-family:var(--font-display);
    font-size:clamp(21px,5.6vw,30px);
    font-weight:900;
    letter-spacing:-0.01em;
    color:var(--white);
  }
  .site-nav__link::before{
    content:attr(data-index);
    font-family:var(--font-mono);
    font-size:11px;
    font-weight:700;
    letter-spacing:.18em;
    color:var(--violet);
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{color:var(--green)}
  .site-nav__link[aria-current="page"]::before{color:var(--green)}
}
html.is-nav-open{overflow:hidden}

/* 13. 站点页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,10vw,140px);
  background:linear-gradient(180deg,var(--panel) 0%,var(--black) 100%);
  border-top:1px solid var(--stroke);
  color:var(--muted);
  font-size:14px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:clamp(60px,12vw,180px);
  height:3px;
  background:var(--green);
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:clamp(20px,4vw,56px);
  padding-block:clamp(36px,5vw,64px) clamp(28px,4vw,48px);
  border-bottom:1px solid var(--stroke);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(30px,5vw,58px);
  font-weight:900;
  line-height:1;
  letter-spacing:-0.03em;
  color:var(--white);
}
.footer-brand__line{margin-top:12px;font-size:14px;color:var(--muted);letter-spacing:.04em}
.footer-stats{display:flex;flex-wrap:wrap;gap:clamp(18px,3vw,44px)}
.footer-stats li{display:flex;flex-direction:column;gap:8px}
.footer-stats__num{
  font-size:clamp(22px,3vw,34px);
  line-height:1;
  color:var(--white);
  letter-spacing:-0.02em;
}
.footer-stats__cap{font-size:11px;letter-spacing:.16em;color:var(--muted)}
.footer-grid{
  display:grid;
  gap:clamp(24px,3vw,40px);
  grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  padding-block:clamp(32px,4.5vw,56px);
}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:16px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--white);
  text-transform:uppercase;
}
.footer-col__title::before{content:"";width:16px;height:2px;background:var(--violet)}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-link{
  display:inline-block;
  color:var(--muted);
  font-size:14px;
  transition:color .18s ease-out,padding-left .18s ease-out;
}
.footer-link:hover{color:var(--green);padding-left:4px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tag{
  display:inline-block;
  padding:5px 11px;
  border:1px solid var(--stroke);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--muted);
  transition:border-color .18s ease-out,color .18s ease-out;
}
.footer-tag:hover{border-color:var(--violet);color:var(--white)}
.footer-meta{display:flex;flex-direction:column;gap:12px;font-size:13.5px}
.footer-meta__row{display:flex;gap:10px;align-items:baseline}
.footer-meta__key{
  flex:0 0 auto;
  min-width:48px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--muted);
  opacity:.72;
}
.footer-meta__val{color:#B9C4D2;word-break:break-word}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:22px 40px;
  border-top:1px solid var(--stroke);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.footer-bottom__legal{color:var(--white)}
.footer-bottom__note{flex:1 1 100%;color:var(--muted);opacity:.8;line-height:1.6}

/* 14. 减少动态效果
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
}