/* ==========================================================================
   BEPLAY赛场 · /assets/site.css
   共享外壳：设计令牌 / 重置 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 0. 设计令牌 ---------- */
:root{
  --ink-900:#070B14;
  --ink-800:#0D1424;
  --panel:#16233A;
  --line:#2A3A57;
  --line-soft:rgba(42,58,87,.55);
  --text:#EAF2FF;
  --muted:#9FB3D1;
  --pulse:#C6FF3D;
  --kick:#FF7A1A;
  --cyan:#35D0FF;
  --red:#FF4D6D;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell-width:min(1220px,calc(100% - 44px));
  --radius:3px;
  --shadow-soft:0 22px 46px -30px rgba(0,0,0,.92);
}

/* ---------- 1. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}

body{
  margin:0;
  min-height:100%;
  background:
    radial-gradient(1180px 620px at 84% -10%,rgba(198,255,61,.075),transparent 62%),
    radial-gradient(900px 520px at 4% 14%,rgba(53,208,255,.06),transparent 60%),
    var(--ink-900);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:500;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

img,video,svg{max-width:100%}
img,video{display:block;height:auto}

h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
}
h1{font-size:clamp(38px,6.6vw,84px)}
h2{font-size:clamp(26px,3.6vw,48px)}
h3{font-size:clamp(19px,2.1vw,26px)}
h4{font-size:18px}

p{margin:0 0 1.1em;max-width:38em}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
code,kbd,samp,pre{font-family:var(--font-mono)}

::selection{background:var(--pulse);color:var(--ink-900)}

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

/* ---------- 2. 中文排版与通用工具 ---------- */
.shell{
  width:var(--shell-width);
  margin-inline:auto;
}

.display{
  margin:0;
  font-size:clamp(44px,8.4vw,132px);
  line-height:.94;
  font-weight:900;
  letter-spacing:-.03em;
}

.stack{display:flex;flex-direction:column;gap:16px}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

.text-muted{color:var(--muted)}
.text-pulse{color:var(--pulse)}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 3. 跳至主要内容 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-140px;
  z-index:200;
  padding:11px 18px;
  border-radius:2px;
  background:var(--pulse);
  color:var(--ink-900);
  font-size:14px;
  font-weight:800;
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:12px}

/* ---------- 4. 头部：双层信息导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(7,11,20,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  pointer-events:none;
  background:linear-gradient(90deg,var(--pulse),var(--cyan));
  transition:width .12s linear;
}

.site-header__top{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:66px;
  padding:10px 0;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:inherit;
  text-decoration:none;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:0 0 auto;
  background:linear-gradient(140deg,var(--pulse),#7cbe10);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:20px;
  font-weight:900;
  line-height:1;
  transform:skewX(-8deg);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.18;
  min-width:0;
}
.brand__name{
  font-size:19px;
  font-weight:900;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand__line{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--muted);
  white-space:nowrap;
}

/* 上层快捷标签 */
.topnav{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 0 0 auto;
  padding:0;
  list-style:none;
}
.topnav__item{
  padding:6px 11px;
  border:1px solid var(--line);
  border-radius:2px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
  white-space:nowrap;
}

/* 状态徽标 */
.live-badge{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin:0;
  padding:7px 12px;
  border:1px solid var(--line);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
}
.live-badge__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--pulse);
  animation:pulse-ring 2.6s ease-out infinite;
}
@keyframes pulse-ring{
  0%{box-shadow:0 0 0 0 rgba(198,255,61,.55)}
  70%{box-shadow:0 0 0 9px rgba(198,255,61,0)}
  100%{box-shadow:0 0 0 0 rgba(198,255,61,0)}
}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:44px;
  height:40px;
  margin-left:14px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:2px;
  background:transparent;
  color:var(--text);
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--pulse)}
.nav-toggle__bar{
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform .26s cubic-bezier(.3,.7,.3,1),opacity .18s ease;
}
.site-header[data-open] .nav-toggle{
  border-color:var(--pulse);
  color:var(--pulse);
}
.site-header[data-open] .nav-toggle__bar:nth-child(2){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:nth-child(3){opacity:0}
.site-header[data-open] .nav-toggle__bar:nth-child(4){transform:translateY(-6px) rotate(-45deg)}

/* 下层栏目索引 */
.site-nav{
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(13,20,36,.88),rgba(7,11,20,.88));
}
.site-nav__inner{
  display:flex;
  align-items:center;
  gap:22px;
  min-height:52px;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.site-nav__list::-webkit-scrollbar{display:none}
.site-nav__link{
  display:block;
  padding:15px 14px;
  border-bottom:2px solid transparent;
  color:var(--muted);
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s ease,border-color .2s ease;
}
.site-nav__link:hover{
  color:var(--text);
  border-bottom-color:var(--line);
}
.site-nav__link[aria-current="page"]{
  color:var(--pulse);
  border-bottom-color:var(--pulse);
}
.site-nav__utilities{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:auto;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--muted);
}
.site-nav__utility{white-space:nowrap}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  margin-top:0;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,20,36,.96),rgba(7,11,20,1));
  color:var(--text);
}
.site-footer::before{
  content:"";
  display:block;
  height:2px;
  background:linear-gradient(90deg,var(--pulse),var(--cyan) 46%,transparent 88%);
}
.site-footer__inner{padding:62px 0 34px}

.site-footer__top{
  display:grid;
  grid-template-columns:minmax(240px,1.05fr) 2.4fr;
  gap:48px;
  align-items:start;
}
.site-footer__brand{display:flex;flex-direction:column;gap:14px}
.brand--footer .brand__mark{width:34px;height:34px;font-size:18px}
.brand--footer .brand__name{font-size:17px}
.site-footer__tagline{
  margin:0;
  max-width:30em;
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
}

.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:34px 26px;
}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--pulse);
}
.footer-col__title-link{
  color:inherit;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .2s ease;
}
.footer-col__title-link:hover{border-bottom-color:var(--pulse)}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:9px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-col__link{
  display:inline-block;
  color:var(--muted);
  font-size:14px;
  line-height:1.55;
  text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.footer-col__link:hover{
  color:var(--pulse);
  transform:translateX(3px);
}

.site-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
  margin-top:50px;
  padding-top:22px;
  border-top:1px solid var(--line-soft);
}
.footer-meta{
  margin:0;
  max-width:none;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  letter-spacing:.05em;
  color:var(--muted);
}
.footer-links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-links__item{display:inline-flex}
.footer-links__link{
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  color:var(--muted);
  font-size:12px;
  letter-spacing:.16em;
  text-decoration:none;
  transition:color .2s ease,border-color .2s ease;
}
.footer-links__link:hover{
  color:var(--text);
  border-bottom-color:var(--pulse);
}

/* ---------- 6. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid var(--line);
  border-radius:2px;
  background:transparent;
  color:var(--text);
  font-family:inherit;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{border-color:var(--pulse);color:var(--pulse)}
.btn--pulse{
  background:var(--pulse);
  border-color:var(--pulse);
  color:var(--ink-900);
}
.btn--pulse:hover{
  background:#d8ff70;
  border-color:#d8ff70;
  color:var(--ink-900);
  transform:translateY(-1px);
}
.btn--ghost{background:rgba(22,35,58,.6);color:var(--muted)}
.btn--ghost:hover{color:var(--text);border-color:var(--line)}
.btn--kick{border-color:var(--kick);color:var(--kick)}
.btn--kick:hover{background:rgba(255,122,26,.1);color:var(--kick)}
.btn--sm{padding:9px 15px;font-size:13px}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__link{color:var(--muted);text-decoration:none;transition:color .2s ease}
.breadcrumb__link:hover{color:var(--pulse)}
.breadcrumb__item[aria-current="page"]{color:var(--text)}

/* ---------- 8. 正文容器与区块 ---------- */
.page-main{display:block}
.section{padding:clamp(48px,7vw,88px) 0}
.section--tight{padding:clamp(26px,3.4vw,40px) 0}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px 28px;
  margin-bottom:34px;
}
.section__eyebrow{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--pulse);
}
.section__title{margin:0}
.section__lede{
  margin:0;
  max-width:38em;
  color:var(--muted);
  font-size:16px;
}

/* ---------- 9. 网格 ---------- */
.grid{display:grid;gap:22px}
.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))}
.grid--split{
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  gap:38px;
}

/* ---------- 10. 专题研究板 / 数据卡 ---------- */
.panel{
  position:relative;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(22,35,58,.9),rgba(13,20,36,.72));
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.panel:hover{
  border-color:rgba(198,255,61,.5);
  box-shadow:var(--shadow-soft);
  transform:translateY(-2px);
}
.panel--accent{border-color:rgba(198,255,61,.45)}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-bottom:14px;
}
.panel__label{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--muted);
}
.panel__title{margin:0 0 10px;font-size:20px}
.panel__body{margin:0;color:var(--muted);font-size:15px}
.panel__meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- 11. 数字与注记 ---------- */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4vw,46px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--pulse);
}
.stat__label{
  font-size:12px;
  letter-spacing:.24em;
  color:var(--muted);
}
.stat--kick .stat__value{color:var(--kick)}
.stat--cyan .stat__value{color:var(--cyan)}

.note{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.28em;
  color:var(--muted);
}
.note--side{
  writing-mode:vertical-rl;
  letter-spacing:.42em;
}
.note--pulse{color:var(--pulse)}

.tag{
  display:inline-flex;
  align-items:center;
  padding:5px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.tag--pulse{
  border-color:rgba(198,255,61,.5);
  color:var(--pulse);
}

/* ---------- 12. 图片容器基座 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(140deg,var(--panel),var(--ink-800));
  isolation:isolate;
}
.media > img,
.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(1.18) contrast(1.06);
  transition:transform .5s cubic-bezier(.2,.7,.3,1);
}
.media:hover > img,
.media:hover > video{transform:scale(1.035)}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media[data-frame="cut"]{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--muted);
  background:linear-gradient(180deg,transparent,rgba(7,11,20,.86));
}

/* ---------- 13. 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .62s ease,transform .62s cubic-bezier(.22,.7,.3,1);
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1180px){
  .topnav{display:none}
}

@media (max-width:1040px){
  .site-footer__top{grid-template-columns:minmax(0,1fr);gap:36px}
  .grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:900px){
  html{scroll-padding-top:76px}

  .live-badge{display:none}
  .nav-toggle{display:inline-flex}

  .site-header__top{min-height:60px;gap:12px}
  .brand{margin-right:auto}

  .site-nav{
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height .36s cubic-bezier(.3,.7,.3,1),visibility 0s linear .36s;
  }
  .site-header[data-open] .site-nav{
    max-height:min(74vh,620px);
    overflow-y:auto;
    visibility:visible;
    transition:max-height .36s cubic-bezier(.3,.7,.3,1),visibility 0s;
  }

  .site-nav__inner{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    min-height:0;
    padding:6px 0 18px;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    overflow:visible;
  }
  .site-nav__link{
    padding:14px 12px;
    border-bottom:1px solid var(--line-soft);
    border-left:2px solid transparent;
    font-size:16px;
  }
  .site-nav__link:hover{border-bottom-color:var(--line-soft)}
  .site-nav__link[aria-current="page"]{
    border-bottom-color:var(--line-soft);
    border-left-color:var(--pulse);
    background:rgba(198,255,61,.06);
  }
  .site-nav__utilities{
    flex-wrap:wrap;
    gap:10px 18px;
    margin:16px 0 0;
    padding:14px 12px 0;
    border-top:1px dashed var(--line);
  }
}

@media (max-width:860px){
  :root{--shell-width:min(1220px,calc(100% - 32px))}
  body{font-size:16px}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__legal{flex-direction:column;align-items:flex-start;gap:14px}
}

@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .brand__line{display:none}
  .panel{padding:20px}
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .site-footer__inner{padding:44px 0 28px}
}

@media (max-width:420px){
  .site-footer__nav{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .media:hover > img,
  .media:hover > video{transform:none}
  .panel:hover{transform:none}
}