/* ==========================================================================
   b体育赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   视觉基调：夜间赛场指挥室，深墨绿底 + 荧光青数据线 + 橙红关键指标
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,dl,dt,dd,figure,blockquote,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
th,td{text-align:left}
hr{border:0;height:1px;background:var(--c-line);margin:0}
::selection{background:rgba(53,240,200,.3);color:#03110D}

/* ---------- 2. 变量 ---------- */
:root{
  /* 色板 */
  --c-ink:#0B1F1A;
  --c-panel:#102C25;
  --c-cyan:#35F0C8;
  --c-cyan-2:#7DFADF;
  --c-flare:#FF5A36;
  --c-amber:#FFB03A;
  --c-bone:#E8F1EC;
  --c-muted:#8FA6A0;
  --c-line:#1E3B34;
  --c-deep:#05100D;

  /* 字体 */
  --f-head:'Arial Narrow','Helvetica Neue Condensed','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --f-body:system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --f-mono:ui-monospace,SFMono-Regular,'SF Mono',Menlo,Consolas,'Liberation Mono',monospace;

  /* 尺度 */
  --wrap:1440px;
  --pad:48px;
  --rail:88px;
  --gap:16px;
  --radius:2px;

  /* 动效 */
  --t-fast:120ms;
  --t-base:180ms;
  --t-slow:220ms;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--c-ink);
  background-image:
    radial-gradient(1100px 480px at 8% -8%, rgba(53,240,200,.10), transparent 62%),
    radial-gradient(760px 380px at 96% 1%, rgba(255,176,58,.045), transparent 60%);
  background-repeat:no-repeat;
  color:var(--c-bone);
  font-family:var(--f-body);
  font-size:15px;
  line-height:1.55;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--f-head);
  font-weight:700;
  line-height:1.24;
  letter-spacing:.01em;
}
h1{font-size:clamp(22px,2.6vw,36px)}
h2{font-size:clamp(19px,1.9vw,26px)}
h3{font-size:17px}
h4{font-size:15px}
p{max-width:78ch}
small{font-size:12px;color:var(--c-muted)}

:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px;border-radius:var(--radius)}

/* 等宽数字：轮次 / 百分比 / 版本号 */
.mono{
  font-family:var(--f-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}

/* ---------- 4. 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.u-3{grid-column:span 3}
.u-4{grid-column:span 4}
.u-6{grid-column:span 6}
.u-8{grid-column:span 8}
.u-12{grid-column:span 12}

/* 横向数据带：允许突破栅格向右溢出 */
.rail{
  display:flex;
  gap:var(--gap);
  overflow-x:auto;
  padding-bottom:8px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
  scrollbar-color:var(--c-line) transparent;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--c-line)}
.rail::-webkit-scrollbar-thumb{background:var(--c-cyan)}
.rail > *{flex:0 0 auto;scroll-snap-align:start}

/* ---------- 5. 区块标题 ---------- */
.sec-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--c-line);
  margin-bottom:24px;
}
.sec-head__kicker{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-cyan);
}
.sec-head__title{
  font-family:var(--f-head);
  font-weight:700;
  font-size:22px;
  letter-spacing:.01em;
  color:var(--c-bone);
}
.sec-head__meta{
  margin-left:auto;
  font-family:var(--f-mono);
  font-size:11.5px;
  color:var(--c-muted);
  white-space:nowrap;
}

/* ---------- 6. 面包屑与正文 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:18px 0;
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
}
.crumbs a{color:var(--c-muted);transition:color var(--t-fast) linear}
.crumbs a:hover{color:var(--c-cyan-2)}
.crumbs__sep{color:var(--c-line)}
.crumbs [aria-current="page"]{color:var(--c-bone)}

.prose{max-width:74ch;font-size:15px;line-height:1.55}
.prose p + p{margin-top:.7em}
.prose h2,.prose h3{margin-top:1.4em;margin-bottom:.5em}
.prose ul,.prose ol{margin:.6em 0 .6em 1.1em}
.prose ul li{list-style:square;color:var(--c-muted)}
.prose ul li::marker{color:var(--c-cyan)}

/* ---------- 7. 标签与面板 ---------- */
.label{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:2px 8px;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:rgba(16,44,37,.7);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--c-muted);
  white-space:nowrap;
}
.label--live{border-color:rgba(53,240,200,.45);color:var(--c-cyan)}
.label--key{border-color:rgba(255,90,54,.5);color:var(--c-flare)}
.label--warn{border-color:rgba(255,176,58,.45);color:var(--c-amber)}

.panel{
  position:relative;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:20px;
  min-width:0;
}
.panel--key{border-color:rgba(255,90,54,.45)}
.panel__label{
  display:block;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--c-muted);
  margin-bottom:10px;
}
.panel__value{
  font-family:var(--f-mono);
  font-variant-numeric:tabular-nums;
  font-size:34px;
  line-height:1;
  font-weight:600;
  color:var(--c-bone);
}
.panel__value--key{color:var(--c-flare)}
.panel__value--live{color:var(--c-cyan)}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:36px;
  padding:0 16px;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:rgba(16,44,37,.6);
  color:var(--c-bone);
  font-size:13px;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:border-color var(--t-fast) linear, color var(--t-fast) linear, background var(--t-fast) linear;
}
.btn:hover{border-color:var(--c-cyan-2);color:var(--c-cyan-2)}
.btn--key{
  background:var(--c-flare);
  border-color:var(--c-flare);
  color:#180703;
  font-weight:700;
}
.btn--key:hover{background:#FF7355;border-color:#FF7355;color:#180703}

/* ---------- 9. 图片容器基础 ---------- */
.frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:linear-gradient(158deg,#0F2A24 0%,#0B1F1A 62%);
}
.frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:
    linear-gradient(to right, rgba(30,59,52,.75) 0 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,59,52,.75) 0 1px, transparent 1px);
  background-size:32px 32px;
  opacity:.55;
}
.frame > img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.frame--wide{aspect-ratio:21 / 9}
.frame--tall{aspect-ratio:4 / 5}
.frame__tag{
  position:absolute;
  left:0;
  top:0;
  z-index:2;
  padding:5px 9px;
  background:rgba(5,16,13,.84);
  border-right:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-cyan);
}
.frame__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:18px 14px 11px;
  font-size:12px;
  color:var(--c-muted);
  background:linear-gradient(to top, rgba(5,16,13,.94), rgba(5,16,13,0));
}

/* ==========================================================================
   10. 页头 · 框景上沿
   ========================================================================== */
.skip-link{
  position:absolute;
  left:16px;
  top:-64px;
  z-index:140;
  padding:10px 16px;
  background:var(--c-cyan);
  color:#04140F;
  font-family:var(--f-mono);
  font-size:12px;
  border-radius:var(--radius);
  transition:top var(--t-fast) linear;
}
.skip-link:focus{top:12px}

.masthead{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg,#0C231D 0%,#0B1F1A 100%);
  border-bottom:1px solid var(--c-line);
}

/* 状态条 */
.masthead__bar{background:rgba(5,16,13,.6);border-bottom:1px solid var(--c-line)}
.masthead__bar-in{
  display:flex;
  align-items:center;
  height:34px;
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
  overflow-x:auto;
  scrollbar-width:none;
}
.masthead__bar-in::-webkit-scrollbar{display:none}
.tick{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:34px;
  padding:0 14px;
  border-right:1px solid var(--c-line);
  white-space:nowrap;
}
.tick:first-child{padding-left:0}
.tick b{font-weight:500;color:var(--c-bone)}
.tick--live{color:var(--c-cyan)}
.tick--end{margin-left:auto;border-right:0;padding-right:0}
.tick__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--c-cyan);
  box-shadow:0 0 8px rgba(53,240,200,.8);
  animation:tickPulse 2.4s linear infinite;
}
@keyframes tickPulse{0%,100%{opacity:1}50%{opacity:.35}}

/* 主行：品牌 — 刻度 — 栏目 */
.masthead__inner{
  display:flex;
  align-items:stretch;
  gap:20px;
  min-height:76px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding-right:6px;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border:1px solid var(--c-cyan);
  border-radius:var(--radius);
  background:linear-gradient(135deg, rgba(53,240,200,.18), rgba(53,240,200,0));
  color:var(--c-cyan);
  font-family:var(--f-mono);
  font-size:19px;
  font-weight:700;
  line-height:1;
}
.brand__text{display:block;min-width:0}
.brand__name{
  display:block;
  font-family:var(--f-head);
  font-weight:700;
  font-size:19px;
  letter-spacing:.02em;
  color:var(--c-bone);
}
.brand__meta{
  display:block;
  margin-top:2px;
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.02em;
  color:var(--c-muted);
}
.masthead__rule{
  position:relative;
  flex:1 1 auto;
  align-self:center;
  height:1px;
  background:var(--c-line);
  min-width:24px;
}
.masthead__rule::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:4px;
  height:5px;
  background:repeating-linear-gradient(to right, var(--c-line) 0 1px, transparent 1px 12px);
}
.masthead__rule::before{
  content:"";
  position:absolute;
  left:0;
  top:-4px;
  width:1px;
  height:9px;
  background:var(--c-cyan);
}

/* 导航 */
.nav{display:flex;align-items:center;flex:0 1 auto;min-width:0}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{display:block;min-width:0}
.nav__link{
  position:relative;
  display:inline-block;
  padding:0 14px;
  line-height:76px;
  font-size:14px;
  color:var(--c-muted);
  white-space:nowrap;
  transition:color var(--t-fast) linear;
}
.nav__link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:18px;
  height:1px;
  background:var(--c-cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t-base) var(--ease);
}
.nav__link:hover{color:var(--c-bone)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--c-cyan)}
.nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* 工具区 */
.masthead__tools{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding-left:18px;
  border-left:1px solid var(--c-line);
  flex:0 0 auto;
}
.devices{
  display:flex;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  overflow:hidden;
}
.device{
  height:30px;
  padding:0 10px;
  border-right:1px solid var(--c-line);
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
  transition:color var(--t-fast) linear, background var(--t-fast) linear;
}
.device:last-child{border-right:0}
.device:hover{color:var(--c-bone)}
.device[aria-pressed="true"]{background:rgba(53,240,200,.13);color:var(--c-cyan)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  height:36px;
  padding:0 12px;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
  transition:color var(--t-fast) linear, border-color var(--t-fast) linear;
}
.nav-toggle[aria-expanded="true"]{color:var(--c-cyan);border-color:var(--c-cyan)}
.nav-toggle__bars{
  display:block;
  width:14px;
  height:9px;
  border-top:1px solid currentColor;
  border-bottom:1px solid currentColor;
}
.nav-toggle__text{display:block}

/* 滚动进度 */
.progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:transparent;
  pointer-events:none;
}
.progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg, var(--c-flare), var(--c-cyan));
}

/* ==========================================================================
   11. 页脚 · 压边收口
   ========================================================================== */
.site-foot{
  position:relative;
  background:var(--c-deep);
  border-top:1px solid var(--c-line);
}
.site-foot::before{
  content:"";
  display:block;
  height:5px;
  background:repeating-linear-gradient(to right, var(--c-line) 0 1px, transparent 1px 12px);
  opacity:.9;
}
.foot__grid{
  display:grid;
  grid-template-columns:1.5fr 1.15fr 1fr 1fr;
  gap:36px 28px;
  padding-top:52px;
  padding-bottom:40px;
}
.foot__brand{min-width:0}
.foot__logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--f-head);
  font-weight:700;
  font-size:17px;
  letter-spacing:.02em;
  color:var(--c-bone);
}
.foot__logo-text{display:block}
.foot__line{
  margin-top:12px;
  max-width:36ch;
  font-size:13px;
  color:var(--c-muted);
}
.foot__line--muted{font-size:12px;color:#6F8A84}
.foot__col{min-width:0}
.foot__title{
  margin-bottom:14px;
  font-family:var(--f-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--c-cyan);
}
.foot__list{display:flex;flex-direction:column;gap:9px}
.foot__list--tags{
  flex-direction:row;
  flex-wrap:wrap;
  gap:8px;
}
.foot__tag{
  display:inline-block;
  padding:3px 8px;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  font-family:var(--f-mono);
  font-size:11.5px;
  color:var(--c-muted);
}
.foot__link{
  font-size:13.5px;
  color:var(--c-muted);
  transition:color var(--t-fast) linear;
}
.foot__link:hover{color:var(--c-cyan-2)}

.foot__contact{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px 40px;
  padding-top:22px;
  padding-bottom:22px;
  border-top:1px solid var(--c-line);
}
.contact-line{
  display:flex;
  flex-wrap:wrap;
  gap:16px 44px;
  flex:1 1 auto;
}
.contact-line__item{display:flex;flex-direction:column;gap:3px;min-width:0}
.contact-line dt{
  font-family:var(--f-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-muted);
}
.contact-line dd{
  font-size:13.5px;
  color:var(--c-bone);
  word-break:break-word;
}
.foot__hint{
  flex:0 1 400px;
  padding:7px 11px;
  border:1px solid var(--c-line);
  border-left:2px solid var(--c-amber);
  border-radius:var(--radius);
  font-size:12px;
  color:var(--c-muted);
}

.foot__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  padding-top:18px;
  padding-bottom:30px;
  border-top:1px solid var(--c-line);
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
}
.foot__legal-item{max-width:none}
.foot__top{
  margin-left:auto;
  padding:6px 12px;
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  font-family:var(--f-mono);
  font-size:12px;
  color:var(--c-muted);
  transition:color var(--t-fast) linear, border-color var(--t-fast) linear;
}
.foot__top:hover{color:var(--c-cyan);border-color:var(--c-cyan)}

/* ==========================================================================
   12. 响应式
   ========================================================================== */
@media (max-width:1200px){
  .nav__link{padding:0 10px;font-size:13.5px}
  .nav__link::after{left:10px;right:10px}
}

@media (max-width:1100px){
  .nav-toggle{display:inline-flex}
  .masthead__rule{display:none}
  .nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    padding:10px 20px 18px;
    background:#0C231D;
    border-bottom:1px solid var(--c-line);
    box-shadow:0 26px 52px rgba(0,0,0,.55);
  }
  .nav[data-open]{display:flex}
  .nav__list{flex-direction:column;align-items:stretch;width:100%}
  .nav__link{
    display:block;
    padding:15px 4px;
    line-height:1.2;
    font-size:15px;
    border-bottom:1px solid var(--c-line);
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{
    color:var(--c-cyan);
    padding-left:12px;
    box-shadow:inset 2px 0 0 var(--c-cyan);
  }
  .foot__grid{grid-template-columns:1fr 1fr;gap:32px 24px;padding-top:42px}
}

@media (max-width:900px){
  .masthead__inner{gap:12px;min-height:66px}
  .brand__meta{display:none}
  .devices{display:none}
  .masthead__tools{padding-left:12px;gap:8px}
  .u-3,.u-4,.u-6,.u-8{grid-column:span 12}
  .sec-head{flex-wrap:wrap;gap:8px 14px}
  .sec-head__meta{margin-left:0;width:100%}
}

@media (max-width:768px){
  :root{--pad:20px}
  body{font-size:14px}
  .masthead__bar-in{height:32px;font-size:11.5px}
  .tick{height:32px;padding:0 11px}
  h1{font-size:clamp(20px,5.6vw,26px)}
  h2{font-size:clamp(18px,4.8vw,22px)}
  .panel__value{font-size:28px}
  .foot__grid{grid-template-columns:1fr;gap:28px;padding-top:36px;padding-bottom:32px}
  .foot__contact{gap:16px 0;padding-top:20px;padding-bottom:20px}
  .contact-line{flex-direction:column;gap:14px}
  .foot__hint{flex:1 1 100%}
  .foot__legal{gap:10px 18px;padding-bottom:26px}
  .foot__top{margin-left:0}
}

@media (max-width:560px){
  .brand__mark{width:28px;height:28px;font-size:16px}
  .brand__name{font-size:17px}
  .btn{height:34px;padding:0 12px;font-size:12.5px}
  .nav-toggle{height:34px;padding:0 10px}
  .frame{aspect-ratio:4 / 3}
  .frame--wide{aspect-ratio:16 / 9}
}

/* ---------- 13. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .tick__dot{animation:none}
  .rail{scroll-snap-type:none}
}