/* =========================================================
   三亿体育赛场 · 共享样式 /assets/site.css
   夜场墨绿底 + 荧光青绿轨迹 + 计分牌琥珀
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#07120F;
  --ink-deep:#040C0A;
  --panel:#0E211B;
  --mint:#35F2A8;
  --mint-soft:rgba(53,242,168,.12);
  --amber:#FFB92E;
  --blue:#4C8DFF;
  --paper:#F1E9D6;
  --paper-ink:#1A1F1C;
  --haze:#D6E2DC;
  --pulse:#FF6B3D;
  --line:#2A3B34;
  --muted:#8FA79C;
  --muted-dim:#6E8A7E;

  --font-num:"Barlow Condensed","Arial Narrow","Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;

  --shell-w:1280px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --cut:10px;
  --radius:3px;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--haze);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0 0 .45em;font-weight:800;line-height:1.16;letter-spacing:-.02em;color:var(--paper)}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}
a{color:var(--mint);text-underline-offset:3px}
strong{color:var(--paper);font-weight:700}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px}
::selection{background:var(--mint);color:var(--ink)}

/* ---------- 3. 布局基础 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,32px);
}
.page-shell{padding-bottom:clamp(56px,8vw,96px)}

/* ---------- 4. skip link ---------- */
.skip-link{
  position:fixed;
  left:12px;
  top:-72px;
  z-index:220;
  padding:10px 18px;
  background:var(--mint);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 5. 站点头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(7,18,15,.99),rgba(7,18,15,.94));
  border-bottom:1px solid var(--line);
  color:var(--haze);
  backdrop-filter:blur(10px);
}
.header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2vw,28px);
  padding-block:12px;
}

/* 品牌 */
.brand-group{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--paper);
  flex:0 0 auto;
}
.brand-mark{
  width:20px;
  height:20px;
  background:var(--mint);
  clip-path:polygon(0 0,100% 0,100% 58%,58% 100%,0 100%);
  flex:0 0 auto;
}
.brand-name{
  font-size:clamp(16px,1.6vw,19px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  white-space:nowrap;
}
.version-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.5;
  padding:1px 6px;
  border-radius:2px;
  background:var(--amber);
  color:var(--ink);
  white-space:nowrap;
}

/* 桌面导航 */
.site-nav{flex:1 1 auto;display:flex;justify-content:flex-end}
.nav-list{
  display:flex;
  align-items:center;
  flex-wrap:nowrap;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-list li{display:flex;align-items:center}
.nav-list li + li::before{
  content:"/";
  display:inline-block;
  padding:0 1px;
  color:var(--line);
  font-size:12px;
  line-height:1;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 9px;
  font-size:14px;
  line-height:1.3;
  letter-spacing:.01em;
  color:var(--haze);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.nav-link:hover{color:var(--mint)}
.nav-link[aria-current="page"]{color:var(--mint);font-weight:700}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:9px;
  right:9px;
  bottom:1px;
  height:2px;
  background:var(--mint);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--haze);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint)}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
  content:"";
}
.nav-toggle-bars{position:relative;background:currentColor}
.nav-toggle-bars::before{position:absolute;top:-5px;left:0}
.nav-toggle-bars::after{position:absolute;top:5px;left:0}
.nav-toggle[aria-expanded="true"]{border-color:var(--mint);color:var(--mint)}

/* ---------- 6. 日期带 ---------- */
.date-strip{
  background:var(--panel);
  border-top:1px solid var(--line);
}
.date-strip-inner{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,16px);
  padding-block:7px;
}
.date-strip-label{
  flex:0 0 auto;
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted-dim);
  white-space:nowrap;
}
.date-track-wrap{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
  -webkit-overflow-scrolling:touch;
}
.date-track-wrap::-webkit-scrollbar{height:4px}
.date-track-wrap::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}
.date-track{
  display:flex;
  align-items:stretch;
  gap:5px;
  list-style:none;
  margin:0;
  padding:0 2px;
}
.date-chip{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:0;
  padding:3px 10px;
  background:transparent;
  border:1px solid transparent;
  border-radius:2px;
  color:var(--muted);
  cursor:pointer;
  white-space:nowrap;
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.date-chip:hover{border-color:var(--line);color:var(--haze)}
.date-chip-day{
  font-family:var(--font-num);
  font-size:15px;
  font-weight:700;
  letter-spacing:.05em;
  line-height:1.15;
}
.date-chip-week{
  font-size:10px;
  letter-spacing:.1em;
  color:var(--muted-dim);
  line-height:1.2;
}
.date-chip[aria-current="true"]{
  background:var(--mint-soft);
  border-color:var(--mint);
  color:var(--mint);
}
.date-chip[aria-current="true"] .date-chip-week{color:var(--mint)}
.date-readout{
  flex:0 0 auto;
  font-family:var(--font-num);
  font-size:14px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--amber);
  white-space:nowrap;
  font-variant-numeric:tabular-nums;
}

/* ---------- 7. 阅读进度 ---------- */
.progress-rail{
  height:3px;
  background:rgba(42,59,52,.75);
}
.progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--mint),var(--blue));
  transition:width .1s linear;
}

/* ---------- 8. 站点页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--ink);
  border-top:1px solid var(--line);
  color:var(--haze);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.5fr;
  gap:clamp(20px,3vw,44px);
  padding-block:clamp(36px,5vw,68px) clamp(28px,4vw,52px);
}
.footer-col{min-width:0}
.footer-brand{
  margin:0 0 10px;
  font-size:clamp(19px,2.2vw,26px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--paper);
}
.footer-tagline{
  margin:0 0 14px;
  max-width:36ch;
  font-size:13.5px;
  line-height:1.75;
  color:var(--muted);
}
.footer-col-brand .version-tag{margin-top:2px}
.footer-title{
  margin:0 0 14px;
  font-size:10px;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:9px;
}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--haze);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover{color:var(--mint);border-bottom-color:var(--mint)}
.footer-contact{
  list-style:none;
  margin:0 0 16px;
  padding:0;
  display:grid;
  gap:10px;
}
.footer-contact li{display:grid;gap:1px;min-width:0}
.footer-contact-key{
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.footer-contact-value{
  font-size:13px;
  line-height:1.6;
  color:var(--haze);
  overflow-wrap:anywhere;
}
.footer-cta{margin-top:2px}
.footer-base{
  background:var(--ink-deep);
  border-top:1px solid var(--line);
}
.footer-base-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  padding-block:14px;
}
.footer-legal{margin:0;font-size:12px;color:var(--muted)}
.footer-meta{margin:0;font-size:12px;color:var(--muted-dim)}
.footer-base-inner .version-tag{margin-left:auto}

/* ---------- 9. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.3;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--mint);border-color:var(--mint);color:var(--ink)}
.btn-primary:hover{background:#5CF7BF;border-color:#5CF7BF}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--haze)}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn-amber{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.btn-amber:hover{background:#FFC95E;border-color:#FFC95E}

/* ---------- 10. 面包屑与正文 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:7px;
  padding-block:18px 0;
  font-size:12px;
  color:var(--muted-dim);
}
.crumb{color:var(--haze);text-decoration:none}
.crumb:hover{color:var(--mint)}
.crumb-sep{color:var(--line)}
.prose{max-width:68ch}
.prose p{font-size:15.5px;line-height:1.8;color:var(--haze)}
.lead{
  font-size:clamp(15.5px,1.5vw,18px);
  line-height:1.75;
  color:var(--haze);
  max-width:62ch;
}
.eyebrow{
  display:inline-block;
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mint);
}

/* ---------- 11. 编号章节 ---------- */
.chapter{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(12px,2vw,26px);
  align-items:start;
  padding-block:clamp(20px,3vw,34px);
  border-top:1px solid var(--line);
}
.chapter-num{
  font-family:var(--font-num);
  font-size:clamp(38px,6.4vw,72px);
  font-weight:700;
  line-height:.82;
  letter-spacing:-.03em;
  color:transparent;
  -webkit-text-stroke:1px var(--line);
}
.chapter-title{
  margin:0 0 .5em;
  font-size:clamp(19px,2.4vw,27px);
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--paper);
}
.chapter[data-active="true"] .chapter-num{-webkit-text-stroke:1px var(--mint)}

/* ---------- 12. 面板 ---------- */
.panel{
  position:relative;
  padding:clamp(16px,2.4vw,26px);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.panel-notch::after{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:22px;
  height:22px;
  background:linear-gradient(135deg,transparent 0 48%,var(--line) 48% 52%,var(--ink) 52% 100%);
  pointer-events:none;
}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin:0 0 12px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted-dim);
}

/* ---------- 13. 网格 ---------- */
.grid{display:grid;gap:clamp(14px,2.2vw,24px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 14. 指标与标签 ---------- */
.stat{display:grid;gap:4px;min-width:0}
.stat-value{
  font-family:var(--font-num);
  font-size:clamp(32px,5vw,56px);
  font-weight:700;
  line-height:.9;
  letter-spacing:-.01em;
  color:var(--amber);
  font-variant-numeric:tabular-nums;
}
.stat-label{
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  line-height:1.6;
  color:var(--haze);
  background:transparent;
  border:1px solid var(--line);
  border-radius:2px;
}
.tag-mint{color:var(--mint);border-color:rgba(53,242,168,.5);background:var(--mint-soft)}
.tag-amber{color:var(--ink);border-color:var(--amber);background:var(--amber)}
.tag-blue{color:var(--blue);border-color:rgba(76,141,255,.5);background:rgba(76,141,255,.12)}
.pulse-dot{
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--pulse);
  box-shadow:0 0 0 0 rgba(255,107,61,.55);
  animation:pulse-ring 1.9s var(--ease) infinite;
}
@keyframes pulse-ring{
  0%{box-shadow:0 0 0 0 rgba(255,107,61,.55)}
  70%{box-shadow:0 0 0 10px rgba(255,107,61,0)}
  100%{box-shadow:0 0 0 0 rgba(255,107,61,0)}
}

/* ---------- 15. 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(160deg,#12291F 0%,#07120F 70%);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:
    repeating-linear-gradient(90deg,rgba(214,226,220,.055) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(0deg,rgba(214,226,220,.04) 0 1px,transparent 1px 64px);
  pointer-events:none;
}
.media-frame img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-ratio-wide{aspect-ratio:16/9}
.media-ratio-tall{aspect-ratio:3/4}
.media-ratio-square{aspect-ratio:1/1}
.media-caption{
  margin:8px 0 0;
  font-size:12px;
  letter-spacing:.02em;
  color:var(--muted-dim);
}

/* ---------- 16. 目录 ---------- */
.toc{position:relative}
.toc-list{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.toc-link{
  display:block;
  padding:8px 10px;
  font-size:13px;
  line-height:1.5;
  color:var(--muted);
  text-decoration:none;
  border-left:2px solid var(--line);
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.toc-link:hover{color:var(--haze);border-left-color:var(--muted-dim)}
.toc-link[aria-current="true"]{
  color:var(--mint);
  border-left-color:var(--mint);
  background:var(--mint-soft);
}

/* ---------- 17. 暖纸分区 ---------- */
.paper-zone{
  background:var(--paper);
  color:var(--paper-ink);
  border-block:1px solid #CFC5AC;
}
.paper-zone h2,
.paper-zone h3,
.paper-zone h4{color:var(--paper-ink)}
.paper-zone p{color:#333B36}
.paper-zone a{color:#0B5E45}
.paper-zone .stat-label,
.paper-zone .eyebrow{color:#6B6350}

/* ---------- 18. 斜线分隔 ---------- */
.divider-slash{
  height:1px;
  margin:clamp(22px,3vw,38px) 0;
  border:0;
  background:repeating-linear-gradient(45deg,var(--line) 0 6px,transparent 6px 14px);
}

/* ---------- 19. 入场显现 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.js .reveal.is-in{opacity:1;transform:none}

/* ---------- 20. 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
  .footer-col-contact{grid-column:1 / -1}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:min(330px,86vw);
    padding:78px 22px 28px;
    background:var(--panel);
    border-left:1px solid var(--line);
    box-shadow:-18px 0 40px rgba(0,0,0,.5);
    overflow-y:auto;
    transform:translateX(104%);
    visibility:hidden;
    transition:transform .22s var(--ease),visibility .22s var(--ease);
    z-index:90;
  }
  .site-nav[data-open="true"]{transform:translateX(0);visibility:visible}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li{display:block}
  .nav-list li + li::before{display:none}
  .nav-link{
    display:block;
    padding:14px 6px;
    font-size:16px;
    border-bottom:1px solid var(--line);
  }
  .nav-link[aria-current="page"]::after{left:6px;right:auto;width:22px;bottom:8px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-col-brand{grid-column:1 / -1}
  .date-strip-label{display:none}
}

@media (max-width:640px){
  .header-bar{padding-block:10px}
  .brand-name{font-size:15px}
  .brand-mark{width:16px;height:16px}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:8px 10px}
  .date-strip-inner{padding-block:6px}
  .date-chip-day{font-size:14px}
  .date-readout{font-size:12px;letter-spacing:.06em}
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base-inner .version-tag{margin-left:0}
  .chapter{grid-template-columns:minmax(0,1fr);gap:6px}
  .chapter-num{font-size:34px}
}

/* ---------- 21. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js .reveal{opacity:1;transform:none}
  .pulse-dot{animation:none}
}