@charset "utf-8";

/* ============================================================
   B体育主站 · 共享样式 /assets/site.css
   竞技场深底 + 电光蓝结构 + 荧光绿状态 + 聚焦橙数字
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --arena:#0E1420;
  --night:#16202F;
  --night-2:#1B2738;
  --electric:#2E8BFF;
  --lime:#5BE37A;
  --pulse:#FF8A3D;
  --moss:#4C6B5A;
  --clay:#C2704E;
  --bone:#F2EDE4;
  --mist:#9AA6B5;
  --amber:#FFC24B;

  --line:rgba(46,139,255,.26);
  --line-soft:rgba(242,237,228,.10);
  --line-dim:rgba(242,237,228,.06);

  --rail-w:248px;
  --shell:1240px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --r-lg:22px;
  --r-md:14px;
  --r-sm:9px;

  --dur:.32s;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100%;
  background-color:var(--arena);
  background-image:
    radial-gradient(circle at 88% -6%, rgba(46,139,255,.16), transparent 44%),
    radial-gradient(circle at -4% 92%, rgba(91,227,122,.10), transparent 40%);
  background-attachment:fixed;
  color:var(--bone);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:800;line-height:1.18;letter-spacing:-.02em;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
img,svg{max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
table{border-collapse:collapse;width:100%;}

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:4px;
}

#main-content{scroll-margin-top:84px;}

/* ---------- 3. 工具类 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 24px;
}
.stack{display:flex;flex-direction:column;gap:18px;}
.grid-auto{
  display:grid;
  gap:22px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}
.divider{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--electric),rgba(46,139,255,0) 72%);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--electric);
  margin:0;
}
.section-title{
  font-size:clamp(26px,3.2vw,36px);
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--bone);
}
.lede{
  font-size:17px;
  line-height:1.85;
  color:#C7D1DD;
  max-width:38em;
}
.stat-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--pulse);
  line-height:1;
}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  background:rgba(242,237,228,.07);
  color:var(--mist);
  border:1px solid var(--line-dim);
  white-space:nowrap;
}
.tag--lime{background:rgba(91,227,122,.14);color:var(--lime);border-color:rgba(91,227,122,.3);}
.tag--moss{background:rgba(76,107,90,.28);color:#A8C6B2;border-color:rgba(76,107,90,.6);}
.tag--clay{background:rgba(194,112,78,.2);color:#E5A483;border-color:rgba(194,112,78,.45);}
.tag--amber{background:rgba(255,194,75,.16);color:var(--amber);border-color:rgba(255,194,75,.38);}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  list-style:none;
  padding:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb li{display:inline-flex;align-items:center;}
.breadcrumb li + li::before{
  content:"/";
  margin:0 9px;
  color:var(--moss);
}
.breadcrumb a{color:#B8C3D1;transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--lime);}
.breadcrumb [aria-current="page"]{color:var(--bone);}

/* 图片容器 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:var(--night);
  border:1px solid var(--line-soft);
}
.media-frame > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(1.06) contrast(1.05);
}
.media-frame--16x9{aspect-ratio:16/9;}
.media-frame--4x3{aspect-ratio:4/3;}
.media-frame--1x1{aspect-ratio:1/1;}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  margin:0;
  padding:22px 18px 14px;
  font-size:13px;
  line-height:1.6;
  color:#D5DDE7;
  background:linear-gradient(180deg,rgba(14,20,32,0) 0%,rgba(14,20,32,.9) 78%);
}
.media-frame__badge{
  position:absolute;
  top:14px;
  left:14px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(46,139,255,.9);
  color:#04121F;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  font-weight:700;
}

/* 筛选 */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:9px;
}
.filter-btn{
  padding:7px 16px;
  border-radius:999px;
  border:1px solid var(--line-soft);
  background:rgba(22,32,47,.7);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.filter-btn:hover{color:var(--bone);border-color:var(--electric);transform:translateY(-1px);}
.filter-btn.is-active{
  background:var(--electric);
  border-color:var(--electric);
  color:#04121F;
  font-weight:700;
}
[data-filter-item][hidden]{display:none !important;}

/* 滚动显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:11px;
  border:1px solid transparent;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.4;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn--primary{
  background:var(--electric);
  color:#04121F;
  box-shadow:0 10px 26px -14px rgba(46,139,255,.95);
}
.btn--primary:hover{background:#4C9EFF;transform:translateY(-2px);}
.btn--lime{background:var(--lime);color:#06210F;}
.btn--lime:hover{filter:brightness(1.08);transform:translateY(-2px);}
.btn--ghost{background:transparent;color:var(--bone);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--electric);color:var(--electric);transform:translateY(-2px);}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:400;
  padding:10px 18px;
  border-radius:0 0 var(--r-sm) var(--r-sm);
  background:var(--lime);
  color:#06210F;
  font-size:14px;
  font-weight:800;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;}

/* ---------- 6. 头部框架栏 ---------- */
.site-header{
  position:fixed;
  inset:0 auto 0 0;
  z-index:120;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  padding:26px 20px 22px;
  background:linear-gradient(180deg,#182334 0%,#0E1420 58%,#0E1420 100%);
  border-right:1px solid var(--line);
  overflow-y:auto;
  overflow-x:hidden;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:3px;
  background:linear-gradient(90deg,var(--electric),var(--lime) 58%,var(--pulse));
}
.site-header::after{
  content:"";
  position:absolute;
  top:0;
  right:-1px;
  width:2px;
  height:38%;
  background:linear-gradient(180deg,rgba(46,139,255,.9),rgba(46,139,255,0));
  pointer-events:none;
}

/* 品牌 */
.brand-block{
  padding-bottom:20px;
  border-bottom:1px solid var(--line-soft);
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  flex:none;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:13px 5px 13px 5px;
  background:linear-gradient(135deg,var(--electric),var(--lime));
  color:#06111F;
  font-size:23px;
  font-weight:900;
  letter-spacing:-.05em;
  line-height:1;
}
.brand-text{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
}
.brand-name{
  font-size:17px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--bone);
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--mist);
  white-space:nowrap;
}

/* 导航 */
.nav-rail{
  flex:1 1 auto;
  min-height:0;
  margin-top:22px;
}
.nav-rail__label{
  margin:0 0 10px 2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--moss);
}
.nav-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.nav-list a{
  display:flex;
  align-items:center;
  gap:11px;
  padding:9px 12px;
  border-radius:var(--r-sm);
  border-left:2px solid transparent;
  font-size:15px;
  font-weight:500;
  color:#C6D0DC;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-list a::before{
  content:"";
  flex:none;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--moss);
  transition:background-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-list a:hover{
  color:var(--bone);
  background:rgba(46,139,255,.10);
  transform:translateX(3px);
}
.nav-list a:hover::before{background:var(--electric);}
.nav-list a[aria-current="page"]{
  color:var(--bone);
  font-weight:800;
  background:rgba(46,139,255,.17);
  border-left-color:var(--electric);
}
.nav-list a[aria-current="page"]::before{
  background:var(--lime);
  transform:rotate(45deg);
}

/* 底部状态与订阅 */
.header-foot{
  margin-top:24px;
  padding-top:18px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.round-status{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}
.round-status__text b{color:var(--pulse);font-weight:700;}
.round-status__dot{
  flex:none;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--lime);
  animation:bsPulse 2.6s var(--ease) infinite;
}
@keyframes bsPulse{
  0%{box-shadow:0 0 0 0 rgba(91,227,122,.55);}
  70%{box-shadow:0 0 0 9px rgba(91,227,122,0);}
  100%{box-shadow:0 0 0 0 rgba(91,227,122,0);}
}
.header-cta{width:100%;}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 13px;
  border-radius:10px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--bone);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--electric);color:var(--electric);}
.nav-toggle__bars{
  display:flex;
  flex-direction:column;
  gap:4px;
  width:16px;
}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle__bars i:first-child{transform:translateY(3px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg);}

/* 桌面端为主内容与页脚让出框架宽度 */
@media (min-width:1080px){
  main{margin-left:var(--rail-w);}
  .site-footer{margin-left:var(--rail-w);}
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:72px;
  padding:52px 24px 26px;
  background:linear-gradient(180deg,#0E1420 0%,#15202F 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(420px,52%);
  height:2px;
  background:linear-gradient(90deg,var(--electric),var(--lime) 62%,rgba(91,227,122,0));
}
.footer-grid{
  max-width:var(--shell);
  margin:0 auto;
  display:grid;
  gap:38px 30px;
  grid-template-columns:minmax(210px,1.5fr) repeat(3,minmax(150px,1fr));
  padding-bottom:36px;
  border-bottom:1px solid var(--line-soft);
}
.footer-col{min-width:0;}
.footer-brand{
  font-size:25px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--bone);
  margin-bottom:9px;
}
.footer-tag{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--mist);
  line-height:1.9;
}
.footer-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--electric);
}
.footer-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-list a,
.footer-list span{
  font-size:14px;
  color:#B8C3D1;
  transition:color var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--lime);}
.footer-list--contact li{
  font-size:13.5px;
  color:var(--mist);
  line-height:1.75;
  word-break:break-word;
  padding-left:12px;
  border-left:2px solid rgba(194,112,78,.5);
}
.footer-base{
  max-width:var(--shell);
  margin:0 auto;
  padding-top:20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}
.footer-base__note{color:var(--moss);}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1079px){
  .site-header{
    position:sticky;
    top:0;
    left:auto;
    right:auto;
    bottom:auto;
    width:100%;
    flex-direction:row;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    padding:10px 16px;
    background:rgba(14,20,32,.95);
    border-right:0;
    border-bottom:1px solid var(--line);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    overflow:visible;
  }
  .site-header::before{
    inset:auto 0 -1px 0;
    height:1px;
    background:linear-gradient(90deg,var(--electric),var(--lime) 46%,rgba(0,0,0,0));
  }
  .site-header::after{display:none;}

  .brand-block{
    flex:1 1 auto;
    order:1;
    padding-bottom:0;
    border-bottom:0;
  }
  .brand-mark{width:36px;height:36px;font-size:19px;border-radius:11px 4px 11px 4px;}
  .brand-name{font-size:15.5px;}
  .brand-sub{display:none;}

  .nav-toggle{display:inline-flex;order:2;}

  .nav-rail{
    order:4;
    flex:1 0 100%;
    display:none;
    margin-top:0;
    padding-top:12px;
    border-top:1px solid var(--line-soft);
  }
  .nav-rail[data-open],
  .site-header[data-open] .nav-rail{display:block;}

  .header-foot{
    order:5;
    flex:1 0 100%;
    display:none;
    margin-top:0;
    padding-top:14px;
    border-top:1px solid var(--line-soft);
  }
  .site-header[data-open] .header-foot{display:flex;}
  .header-cta{width:auto;align-self:flex-start;}
}

@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:640px){
  .shell{padding:0 18px;}
  .site-footer{padding:40px 18px 22px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
  .section-title{font-size:clamp(24px,7vw,30px);}
}

/* ---------- 9. 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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
}