/* =========================================================
   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
   ========================================================= */

:root{
  --night:#0A1B16;
  --field:#0F2A22;
  --stand:#143A2E;
  --signal:#2BE8A5;
  --signal-dim:#1C9B72;
  --amber:#FF8A3D;
  --amber-dim:#C8621F;
  --ink:#EAF6F0;
  --ink-soft:#9CB8AC;
  --rule:#28503F;
  --wrap:1200px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --cut:16px;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:130px;
}

body{
  margin:0;
  background:var(--night);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img,svg,video{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
a{color:var(--signal);text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0}
strong,b{font-weight:700;color:var(--ink)}
hr{border:0;border-top:1px solid var(--rule);margin:2rem 0}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.015em;
  color:var(--ink);
}
h1{font-size:clamp(2rem,5vw,3.4rem)}
h2{font-size:clamp(1.6rem,3.6vw,2.15rem)}
h3{font-size:clamp(1.15rem,2.2vw,1.4rem)}
h4{font-size:1.05rem}

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

main{display:block}

/* ---------- 工具类 ---------- */
.wrap{
  width:min(100% - (var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  letter-spacing:-.01em;
}

/* ---------- 跳至主内容 ---------- */
.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:300;
  padding:.7rem 1.15rem;
  background:var(--signal);
  color:var(--night);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.92rem;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}
.skip-link:focus{left:1rem;top:1rem}

/* =========================================================
   页头
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--night);
}

.scope{
  position:relative;
  background:linear-gradient(180deg,#0C211A 0%,var(--night) 100%);
  border-bottom:1px solid var(--rule);
}
.scope::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(115deg,rgba(43,232,165,.045) 0 1px,transparent 1px 15px);
  pointer-events:none;
}

.scope-inner{
  position:relative;
  width:min(100% - (var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  color:var(--ink);
  flex:0 0 auto;
}
.brand-pip{
  width:10px;
  height:10px;
  background:var(--signal);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  animation:pipPulse 2.8s ease-in-out infinite;
}
@keyframes pipPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(43,232,165,.45)}
  55%{box-shadow:0 0 0 8px rgba(43,232,165,0)}
}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.24rem;
  letter-spacing:.03em;
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--ink-soft);
  padding-left:.7rem;
  border-left:1px solid var(--rule);
  white-space:nowrap;
}

/* 主导航 */
.site-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:.2rem;
}
.nav-list a{
  position:relative;
  display:block;
  padding:.55rem .82rem;
  color:var(--ink-soft);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.94rem;
  letter-spacing:.02em;
  transition:color .18s ease;
  white-space:nowrap;
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:.82rem;
  right:.82rem;
  bottom:.24rem;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.nav-list a:hover{color:var(--ink)}
.nav-list a:hover::after,
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--signal)}

.nav-cta{
  margin-left:.6rem;
  color:var(--amber) !important;
  padding:.5rem 1.1rem !important;
  background:rgba(255,138,61,.07);
  box-shadow:inset 0 0 0 1px var(--amber-dim);
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  transition:background .18s ease,color .18s ease,box-shadow .18s ease;
}
.nav-cta::after{display:none}
.nav-cta:hover{
  background:var(--amber);
  color:#16100A !important;
  box-shadow:inset 0 0 0 1px var(--amber);
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.55rem .85rem;
  background:var(--stand);
  color:var(--ink);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.85rem;
  letter-spacing:.04em;
  cursor:pointer;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.nav-toggle-glyph{display:grid;gap:3px;width:16px}
.nav-toggle-glyph i{
  display:block;
  height:2px;
  background:var(--signal);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 阅读进度 */
.rail-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--signal),var(--amber));
  pointer-events:none;
}

/* 檐下快捷带 */
.quick-band{
  background:var(--field);
  border-bottom:1px solid var(--rule);
}
.quick-inner{
  width:min(100% - (var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  min-height:48px;
  display:flex;
  align-items:center;
  gap:.9rem;
  flex-wrap:wrap;
  padding-block:.4rem;
}
.quick-kicker{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--ink-soft);
  padding-right:.9rem;
  border-right:1px solid var(--rule);
}
.quick-list{display:flex;flex-wrap:wrap;gap:.45rem}
.quick-list a{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.3rem .8rem;
  background:var(--stand);
  color:var(--ink-soft);
  font-size:.86rem;
  font-weight:600;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:background .18s ease,color .18s ease;
}
.quick-list a:hover{background:var(--signal);color:var(--night)}
.quick-no{
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:700;
  color:var(--signal);
  letter-spacing:.04em;
}
.quick-list a:hover .quick-no{color:var(--night)}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  margin-top:clamp(3rem,7vw,5rem);
  background:var(--field);
  border-top:1px solid var(--rule);
  color:var(--ink-soft);
}
.foot-rule{
  height:2px;
  background:linear-gradient(90deg,
    var(--signal) 0,var(--signal) 24%,
    var(--amber) 24%,var(--amber) 34%,
    var(--rule) 34%,var(--rule) 100%);
}
.foot-wrap{
  width:min(100% - (var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  padding:clamp(2.5rem,5vw,3.75rem) 0 clamp(1.75rem,3vw,2.5rem);
  display:grid;
  grid-template-columns:1.5fr .9fr 1.2fr;
  gap:clamp(1.75rem,4vw,3rem);
}

.foot-brand .brand{margin-bottom:1.1rem}
.brand--foot .brand-name{font-size:1.12rem}
.foot-line{
  font-size:.92rem;
  line-height:1.85;
  color:var(--ink-soft);
  max-width:36ch;
}
.foot-stamp{
  margin-top:.9rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.12em;
  color:var(--ink-soft);
}
.foot-stamp .num{color:var(--signal)}
.foot-cta{margin-top:1.3rem}

.foot-title{
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--ink);
  margin:0 0 1.1rem;
  padding-bottom:.6rem;
  border-bottom:1px solid var(--rule);
}

.foot-index ul{display:grid;gap:.6rem}
.foot-index a{
  color:var(--ink-soft);
  font-size:.92rem;
  transition:color .18s ease;
}
.foot-index a:hover{color:var(--signal)}

.foot-contact-list{display:grid;gap:1rem}
.foot-contact-list li{display:grid;gap:.25rem}
.foot-key{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--rule);
  filter:brightness(1.75);
}
.foot-val{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  color:var(--ink);
  font-size:.92rem;
  word-break:break-all;
}
.foot-note{
  margin-top:1rem;
  font-size:.8rem;
  line-height:1.7;
  color:var(--ink-soft);
}

.copy-btn{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.1em;
  padding:.16rem .5rem;
  color:var(--ink-soft);
  background:transparent;
  box-shadow:inset 0 0 0 1px var(--rule);
  cursor:pointer;
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
  transition:color .18s ease,box-shadow .18s ease,background .18s ease;
}
.copy-btn:hover,
.copy-btn[data-copied="true"]{
  color:var(--signal);
  box-shadow:inset 0 0 0 1px var(--signal-dim);
  background:rgba(43,232,165,.08);
}

.foot-base{border-top:1px solid var(--rule)}
.foot-base-inner{
  width:min(100% - (var(--gutter) * 2),var(--wrap));
  margin-inline:auto;
  padding:1.1rem 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
}
.foot-legal{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.06em;
  color:var(--ink-soft);
}

/* =========================================================
   通用组件
   ========================================================= */
.section{padding:clamp(2.75rem,6vw,4.5rem) 0}
.section-head{
  display:flex;
  align-items:flex-end;
  gap:.9rem;
  flex-wrap:wrap;
  padding-bottom:.9rem;
  border-bottom:1px solid var(--rule);
  margin-bottom:1.75rem;
}
.section-no{
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--signal);
  padding-bottom:.15rem;
}
.section-title{font-size:clamp(1.45rem,3.2vw,2.05rem)}

.panel{
  background:var(--field);
  padding:1.25rem;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:background .2s ease,transform .2s ease;
}
.panel:hover{background:var(--stand);transform:translateY(-2px)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.72rem 1.4rem;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.92rem;
  letter-spacing:.02em;
  cursor:pointer;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .12s ease;
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--amber);color:#16100A}
.btn--primary:hover{background:#FFA365}
.btn--ghost{
  background:transparent;
  color:var(--signal);
  box-shadow:inset 0 0 0 1px var(--signal-dim);
}
.btn--ghost:hover{background:rgba(43,232,165,.1)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.2rem .55rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--signal);
  background:rgba(43,232,165,.09);
}
.tag--amber{color:var(--amber);background:rgba(255,138,61,.13)}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem;
  padding-top:clamp(1rem,3vw,1.75rem);
  font-size:.82rem;
  color:var(--ink-soft);
}
.crumbs li{display:flex;align-items:center;gap:.4rem}
.crumbs li + li::before{
  content:"/";
  font-family:var(--font-mono);
  color:var(--rule);
  filter:brightness(1.6);
}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--signal)}
.crumbs [aria-current="page"]{color:var(--ink)}

.prose{
  max-width:68ch;
  font-size:1.02rem;
  line-height:1.85;
  color:var(--ink-soft);
}
.prose h2,.prose h3{color:var(--ink);margin-top:1.9em;margin-bottom:.55em}
.prose p + p{margin-top:1.05em}
.prose ul{margin:1.1em 0}
.prose li{position:relative;padding-left:1.1rem;margin-top:.55em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:7px;
  background:var(--signal);
  transform:rotate(45deg);
}
.prose a{text-decoration:underline;text-underline-offset:3px}

/* 图片容器 */
.figure{
  position:relative;
  display:block;
  margin:0;
  overflow:hidden;
  background:var(--stand);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
}
.figure > img,
.figure > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.figure:hover > img{transform:scale(1.03)}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(10,27,22,0) 34%,rgba(10,27,22,.76) 100%);
  pointer-events:none;
}
.figure--bare::after{display:none}
.figure--16x9{aspect-ratio:16 / 9}
.figure--4x3{aspect-ratio:4 / 3}
.figure--3x4{aspect-ratio:3 / 4}
.figure--1x1{aspect-ratio:1 / 1}
.figure-cap{
  display:block;
  padding-top:.55rem;
  font-size:.78rem;
  line-height:1.6;
  color:var(--ink-soft);
}

/* 网格 */
.grid{display:grid;gap:clamp(1rem,2.4vw,1.5rem)}
.grid--split{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

/* 内容路线 */
.route-list{display:grid;gap:.5rem}
.route-list a{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:.9rem;
  padding:.85rem 1.1rem;
  background:var(--field);
  color:var(--ink);
  font-weight:600;
  font-size:.96rem;
  clip-path:polygon(0 0,100% 0,calc(100% - 14px) 100%,0 100%);
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.route-list a:hover{background:var(--stand);color:var(--signal);transform:translateX(3px)}
.route-list .route-no{
  font-family:var(--font-mono);
  font-size:.76rem;
  font-weight:700;
  color:var(--signal);
  letter-spacing:.06em;
}
.route-list .route-meta{
  font-family:var(--font-mono);
  font-size:.74rem;
  color:var(--ink-soft);
}

/* 滚动显现 */
[data-reveal]{
  opacity:0;
  transform:translate3d(-12px,12px,0);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-in{opacity:1;transform:none}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .brand-sub{display:none}
  .nav-list a{padding:.55rem .62rem;font-size:.9rem}
  .nav-cta{margin-left:.3rem;padding:.5rem .9rem !important}
}

@media (max-width:960px){
  .scope-inner{min-height:64px}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    background:var(--field);
    border-bottom:1px solid var(--rule);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height .28s ease,visibility 0s linear .28s;
  }
  .site-nav[data-open]{
    max-height:78vh;
    overflow:auto;
    visibility:visible;
    transition:max-height .28s ease,visibility 0s linear 0s;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:.1rem;
    padding:.7rem var(--gutter) 1.3rem;
  }
  .nav-list a{
    padding:.85rem .4rem;
    font-size:1rem;
    border-bottom:1px solid rgba(40,80,63,.7);
  }
  .nav-list a::after{display:none}
  .nav-list a[aria-current="page"]{color:var(--signal)}
  .nav-cta{
    margin:.85rem 0 0;
    padding:.8rem 1rem !important;
    text-align:center;
    border-bottom:0 !important;
  }

  .grid--split,
  .grid--thirds{grid-template-columns:minmax(0,1fr)}
  .foot-wrap{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1 / -1}
}

@media (max-width:640px){
  html{scroll-padding-top:112px}
  body{font-size:15.5px}
  .quick-kicker{display:none}
  .quick-list{gap:.35rem}
  .quick-list a{padding:.28rem .65rem;font-size:.82rem}
  .grid--halves{grid-template-columns:minmax(0,1fr)}
  .foot-wrap{grid-template-columns:minmax(0,1fr)}
  .foot-base-inner{flex-direction:column;align-items:flex-start}
  .prose{font-size:.99rem}
}

@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;transform:none}
  .figure:hover > img{transform:none}
  .panel:hover{transform:none}
  .route-list a:hover{transform:none}
}