/* =========================================================
   B体育登录 · B呼号台 — 共享样式 /assets/site.css
   ========================================================= */

/* ---------- 1. 令牌 ---------- */
:root{
  --abyss:#061426;
  --deck:#0D2740;
  --lime:#3BF0A6;
  --orange:#FF7A2F;
  --ice:#F1F6FA;
  --cool:#9AB0C2;
  --line:#1E3247;
  --steel:#2F6E8F;
  --amber:#FFC24B;
  --paper:#F5F8FA;
  --ink:#0B1826;

  --rail-w:72px;
  --mast-h:64px;
  --wrap-max:1280px;
  --gut:24px;

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-head:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","DejaVu Sans Mono",monospace;

  --t-fast:120ms ease;
  --t-mid:160ms ease;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
::selection{background:var(--lime);color:var(--abyss);}
[hidden]{display:none !important;}

/* ---------- 3. 页面基底与中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--abyss);
  background-image:
    repeating-linear-gradient(0deg, rgba(30,50,71,.42) 0, rgba(30,50,71,.42) 1px, transparent 1px, transparent 64px),
    repeating-linear-gradient(90deg, rgba(30,50,71,.26) 0, rgba(30,50,71,.26) 1px, transparent 1px, transparent 64px);
  color:var(--ice);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.78;
  color-scheme:dark;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;letter-spacing:-.01em;line-height:1.15;}
strong,b{font-weight:700;}
p{word-break:break-word;}
#main-content{display:block;scroll-margin-top:calc(var(--mast-h) + 24px);}

@media (min-width:1024px){
  body{padding-left:var(--rail-w);padding-top:var(--mast-h);}
}
@media (min-width:768px) and (max-width:1023px){
  body{font-size:16.5px;}
}

/* ---------- 4. 工具类 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gut);
}
@media (min-width:1024px){ .wrap{padding-inline:48px;} }

.stack > * + *{margin-top:24px;}
.grid{display:grid;gap:24px;}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.asym{display:grid;gap:32px;}
@media (min-width:1024px){
  .asym{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:40px 48px;}
  .asym__aside{max-width:320px;}
}

.num{
  font-family:var(--font-num);
  font-weight:600;
  letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
}
.label{
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lime);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  font-weight:800;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lime);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime);}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 24px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--ice);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  line-height:1;
  text-transform:uppercase;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.btn:hover{transform:translateY(-2px);}
.btn--solid{background:var(--lime);border-color:var(--lime);color:var(--abyss);}
.btn--solid:hover{background:#5df5b8;border-color:#5df5b8;}
.btn--ghost{border-color:var(--steel);color:var(--ice);}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn--sm{padding:10px 16px;font-size:11.5px;letter-spacing:.12em;}

/* ---------- 6. 头部 ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:12px 20px;
  background:var(--lime);
  color:var(--abyss);
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
  transform:translateY(-220%);
  transition:transform var(--t-fast);
}
.skip-link:focus{transform:translateY(0);}

.site-header{position:relative;z-index:80;}

.masthead{
  position:sticky;
  top:0;
  z-index:90;
  display:flex;
  align-items:center;
  gap:16px;
  min-height:var(--mast-h);
  padding:8px var(--gut);
  background:rgba(6,20,38,.96);
  border-bottom:1px solid var(--line);
}
@media (min-width:1024px){
  .masthead{
    position:fixed;
    top:0;
    left:0;
    right:0;
    height:var(--mast-h);
    padding:0 28px 0 calc(var(--rail-w) + 28px);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
  }
}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand__glyph{
  flex:0 0 auto;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  background:var(--lime);
  color:var(--abyss);
  font-family:var(--font-head);
  font-size:21px;
  font-weight:900;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0;}
.brand__name{font-size:15px;font-weight:800;letter-spacing:.04em;line-height:1.15;}
.brand__line{
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.2em;
  line-height:1.2;
  text-transform:uppercase;
  color:var(--cool);
  white-space:nowrap;
}
@media (max-width:400px){ .brand__line{display:none;} }

.signal-bar{margin-left:auto;display:none;align-items:center;}
@media (min-width:1160px){ .signal-bar{display:flex;} }
.signal-bar__item{
  display:flex;
  align-items:baseline;
  gap:8px;
  padding:0 20px;
  border-left:1px solid var(--line);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cool);
  white-space:nowrap;
}
.signal-bar__item:first-child{border-left:0;}
.signal-bar__key{color:var(--cool);}
.signal-bar__val{font-size:14px;color:var(--lime);}
.signal-dot{
  align-self:center;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--lime);
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(59,240,166,.5);}
  70%{box-shadow:0 0 0 8px rgba(59,240,166,0);}
  100%{box-shadow:0 0 0 0 rgba(59,240,166,0);}
}

.nav-toggle{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:11px 14px;
  border:1px solid var(--line);
  color:var(--ice);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  transition:border-color var(--t-fast),color var(--t-fast);
}
.nav-toggle__bars{display:grid;gap:4px;width:18px;}
.nav-toggle__bar{display:block;height:1px;background:currentColor;transition:transform var(--t-fast);}
.nav-toggle__text{line-height:1;}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(2.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){transform:translateY(-2.5px) rotate(-45deg);}
@media (min-width:1024px){ .nav-toggle{display:none;} }

/* 轨道导航：移动优先 = 右侧抽屉 */
.rail-nav{
  position:fixed;
  top:var(--mast-h);
  right:0;
  bottom:0;
  z-index:88;
  width:min(86vw,340px);
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  background:linear-gradient(180deg,#0A1F34 0%,#061426 100%);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform 220ms ease;
}
.rail-nav[data-open]{transform:translateX(0);}
.rail-nav__list{display:flex;flex-direction:column;padding:16px 0 0;}
.rail-nav__link{
  display:flex;
  align-items:center;
  gap:16px;
  padding:16px 24px;
  border-bottom:1px solid var(--line);
  color:var(--cool);
  transition:color var(--t-fast),background var(--t-fast);
}
.rail-nav__idx{
  font-family:var(--font-num);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--steel);
}
.rail-nav__label{font-size:15px;font-weight:700;letter-spacing:.06em;}
.rail-nav__link:hover,
.rail-nav__link:focus-visible{color:var(--ice);background:rgba(59,240,166,.08);}
.rail-nav__link[aria-current="page"]{
  color:var(--ice);
  background:rgba(59,240,166,.12);
  box-shadow:inset 3px 0 0 var(--lime);
}
.rail-nav__link[aria-current="page"] .rail-nav__idx{color:var(--lime);}
.rail-nav__actions{
  margin-top:auto;
  display:grid;
  gap:12px;
  padding:24px;
  border-top:1px solid var(--line);
  background:rgba(4,12,22,.6);
}
.rail-nav__actions .btn{width:100%;}

/* 桌面端：左侧竖排呼号轨道 */
@media (min-width:1024px){
  .rail-nav{
    top:var(--mast-h);
    left:0;
    right:auto;
    bottom:0;
    width:var(--rail-w);
    border-left:0;
    border-right:1px solid var(--line);
    background:linear-gradient(180deg,#061426 0%,#040d18 100%);
    transform:none;
  }
  .rail-nav__list{
    flex:1;
    justify-content:center;
    gap:0;
    padding:16px 0;
  }
  .rail-nav__link{
    flex-direction:column;
    justify-content:center;
    gap:8px;
    padding:9px 4px;
    border-bottom:0;
  }
  .rail-nav__label{
    writing-mode:vertical-rl;
    text-orientation:mixed;
    font-size:12px;
    font-weight:600;
    letter-spacing:.2em;
  }
  .rail-nav__link[aria-current="page"]{
    background:linear-gradient(180deg,transparent,rgba(59,240,166,.14),transparent);
    box-shadow:inset 3px 0 0 var(--lime);
  }
  .rail-nav__link:hover,
  .rail-nav__link:focus-visible{background:rgba(59,240,166,.07);}
  .rail-nav__actions{display:none;}
}

/* 移动抽屉遮罩（由 JS 在 body 上写入 data-nav="open"） */
@media (max-width:1023px){
  body[data-nav="open"]::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:82;
    background:rgba(4,12,22,.72);
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  background:linear-gradient(180deg,#071a2e 0%,#040c16 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  display:block;
  height:3px;
  background-color:var(--line);
  background-image:linear-gradient(90deg,var(--lime) 0 120px,var(--orange) 120px 168px);
  background-repeat:no-repeat;
}

.footer-grid{display:grid;gap:40px;padding-block:56px 40px;}
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px 32px;}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;padding-block:80px 56px;}
}

.footer-brand{display:block;}
.footer-brand__link{display:inline-flex;align-items:center;gap:12px;}
.footer-brand__glyph{
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  background:var(--lime);
  color:var(--abyss);
  font-family:var(--font-head);
  font-size:19px;
  font-weight:900;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.footer-brand__name{font-family:var(--font-head);font-size:16px;font-weight:800;letter-spacing:.04em;}
.footer-brand__line{margin-top:16px;font-size:13px;letter-spacing:.06em;color:var(--cool);max-width:26ch;}

.footer-col{display:block;}
.footer-col__title{
  font-family:var(--font-head);
  font-size:10.5px;
  font-weight:800;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--lime);
  padding-bottom:12px;
  margin-bottom:18px;
  border-bottom:1px solid var(--line);
}
.footer-col__list li + li{margin-top:11px;}
.footer-col__list a{
  font-size:14.5px;
  color:var(--cool);
  transition:color var(--t-fast),padding-left var(--t-fast);
}
.footer-col__list a:hover,
.footer-col__list a:focus-visible{color:var(--lime);padding-left:4px;}
.footer-col__list--plain li{
  display:flex;
  flex-direction:column;
  gap:3px;
  font-family:var(--font-num);
  font-size:13.5px;
  letter-spacing:.02em;
  color:var(--ice);
}
.footer-col__key{
  font-family:var(--font-sans);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cool);
}
.footer-col--contact .btn{margin-top:22px;}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 28px;
  padding-block:22px 30px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--cool);
}
.footer-base__addr{font-size:12.5px;}
.footer-base__links{display:flex;gap:20px;}
.footer-base__links a{
  border-bottom:1px solid transparent;
  transition:color var(--t-fast),border-color var(--t-fast);
}
.footer-base__links a:hover,
.footer-base__links a:focus-visible{color:var(--lime);border-bottom-color:var(--lime);}
.footer-base__icp{font-family:var(--font-num);letter-spacing:.06em;color:var(--steel);}
.footer-base__copy{margin-left:auto;font-size:12px;color:var(--steel);}
@media (max-width:760px){ .footer-base__copy{margin-left:0;} }

/* ---------- 8. 通用内容组件 ---------- */
.section{padding-block:56px;}
@media (min-width:1024px){ .section{padding-block:80px;} }

.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:14px 24px;
  padding-bottom:18px;
  margin-bottom:32px;
  border-bottom:1px solid var(--line);
}
.section__title{
  font-size:clamp(26px,3.4vw,44px);
  font-weight:800;
  line-height:1.1;
}
.section__note{
  margin-left:auto;
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--cool);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:20px 0;
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--steel);
}
.breadcrumb a{color:var(--cool);transition:color var(--t-fast);}
.breadcrumb a:hover,
.breadcrumb a:focus-visible{color:var(--lime);}
.breadcrumb__sep{color:var(--steel);}

.card{
  position:relative;
  padding:24px;
  background:var(--deck);
  border:1px solid var(--line);
  transition:transform var(--t-fast),border-color var(--t-fast),background var(--t-fast);
}
.card:hover,
.card:focus-within{transform:translateY(-2px);border-color:var(--lime);}
.card__title{
  font-family:var(--font-head);
  font-size:19px;
  font-weight:800;
  line-height:1.3;
  letter-spacing:.01em;
}
.card__meta{margin-top:12px;font-size:12px;letter-spacing:.08em;color:var(--cool);}

.tag-list{display:flex;flex-wrap:wrap;gap:8px;}
.tag-list__item{
  padding:7px 13px;
  border:1px solid var(--line);
  color:var(--cool);
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  transition:color var(--t-fast),border-color var(--t-fast),background var(--t-fast);
}
.tag-list__item:hover,
.tag-list__item[aria-pressed="true"]{
  border-color:var(--lime);
  color:var(--lime);
  background:rgba(59,240,166,.08);
}

.result-line{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px;
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cool);
}
.result-line b{font-family:var(--font-num);font-size:16px;color:var(--lime);}

/* ---------- 9. 内容容器 ---------- */
.prose{max-width:70ch;font-size:17px;line-height:1.78;}
.prose > * + *{margin-top:1.05em;}
.prose h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:800;
  line-height:1.25;
  margin-top:1.9em;
}
.prose h3{font-size:19px;font-weight:800;line-height:1.35;margin-top:1.6em;}
.prose ul > li{position:relative;padding-left:22px;}
.prose ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:10px;
  height:1px;
  background:var(--lime);
}
.prose a{color:var(--lime);border-bottom:1px solid rgba(59,240,166,.45);}
.prose a:hover,
.prose a:focus-visible{border-bottom-color:var(--lime);}
.prose--light{
  max-width:none;
  padding:clamp(24px,4vw,56px);
  background:var(--paper);
  color:var(--ink);
  font-size:18px;
  line-height:1.85;
}
.prose--light h2,
.prose--light h3{color:var(--ink);}
.prose--light a{color:#0a6a48;border-bottom-color:rgba(10,106,72,.45);}
.prose--light .num{color:#0b5c40;}

/* ---------- 10. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--deck);
  border:1px solid var(--line);
}
.media-frame::before{content:"";display:block;padding-top:56.25%;}
.media-frame > img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--tall::before{padding-top:133%;}
.media-frame--square::before{padding-top:100%;}
.media-frame--wide::before{padding-top:42%;}
.media-frame__caption{
  position:absolute;
  left:0;
  bottom:0;
  padding:10px 14px;
  background:rgba(6,20,38,.88);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cool);
}

/* ---------- 11. 动效与进度刻度 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity var(--t-mid),transform var(--t-mid);
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none;}

.scroll-meter{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  z-index:150;
  pointer-events:none;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--amber) 62%,var(--orange));
}
@media (min-width:1024px){ .scroll-meter{left:var(--rail-w);} }

/* ---------- 12. 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;
  }
  .signal-dot{animation:none;box-shadow:none;}
  .js-reveal [data-reveal]{opacity:1;transform:none;}
  .btn:hover,
  .card:hover,
  .card:focus-within{transform:none;}
}