/* =========================================================
   乐竞体育站 · 共享样式 /assets/site.css
   reset / 变量 / 中文排版 / 刊头 / 页脚 / 通用组件
   ========================================================= */

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

:root{
  --ink-900:#0B1A2F;
  --ink-800:#12263F;
  --ink-700:#1B3350;
  --line-600:#2C4A6E;
  --cyan:#00E5FF;
  --cyan-soft:#7CF3FF;
  --coral:#FF6B35;
  --coral-soft:#FFB199;
  --fog:#E9F1F8;
  --mist:#9DB2CA;
  --paper:#F4F7FB;
  --paper-ink:#152538;
  --green:#39D98A;
  --amber:#FFC53D;

  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular",ui-monospace,"Cascadia Mono","Roboto Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --wt:1200px;
  --gut:clamp(16px,4vw,40px);
  --r:2px;
  --ease:cubic-bezier(.4,0,.2,1);
  --z-head:100;
}

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

body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(180deg,rgba(0,229,255,.055) 0,rgba(0,229,255,0) 340px),
    repeating-linear-gradient(90deg,rgba(44,74,110,.15) 0 1px,transparent 1px 104px);
  color:var(--fog);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.014em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- 中文排版 ---------- */

h1,h2,h3,h4{
  margin:0 0 .6em;
  font-weight:700;
  line-height:1.18;
  letter-spacing:.03em;
  text-wrap:balance;
}
h1{font-size:clamp(1.95rem,5vw,3.4rem);}
h2{font-size:clamp(1.5rem,3.2vw,2.25rem);}
h3{font-size:clamp(1.14rem,2.2vw,1.5rem);}
h4{font-size:1.02rem;letter-spacing:.05em;}

p{margin:0 0 1.15em;}
p:last-child{margin-bottom:0;}

a{color:var(--cyan);text-decoration-color:rgba(0,229,255,.4);text-underline-offset:.22em;}
a:hover{color:var(--cyan-soft);text-decoration-color:currentColor;}

strong{color:var(--fog);font-weight:700;}

ul,ol{margin:0 0 1.15em;padding-left:1.3em;}
li{margin:0;}

figure{margin:0;}
img{max-width:100%;height:auto;}
hr{border:0;border-top:1px solid var(--line-600);margin:clamp(24px,4vw,40px) 0;}
code,kbd,samp{font-family:var(--mono);font-size:.88em;}

::selection{background:var(--cyan);color:#04121f;}

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

.skip-link{
  position:absolute;
  left:8px;
  top:-100px;
  z-index:200;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.6rem 1.15rem;
  background:var(--cyan);
  color:#04121f;
  font-family:var(--mono);
  font-size:.78rem;
  letter-spacing:.14em;
  text-decoration:none;
  border-radius:var(--r);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:8px;color:#04121f;}

/* ---------- 布局容器 ---------- */

.container{
  width:100%;
  max-width:var(--wt);
  margin:0 auto;
  padding:0 var(--gut);
}
.container--narrow{max-width:840px;}

.band{padding:clamp(28px,5vw,58px) 0;}
.band--panel{background:var(--ink-800);border-top:1px solid var(--line-600);border-bottom:1px solid var(--line-600);}
.band--paper{background:var(--paper);color:var(--paper-ink);}
.band--paper h1,.band--paper h2,.band--paper h3,.band--paper h4{color:var(--paper-ink);}
.band--paper a{color:#0a6a7a;text-decoration-color:rgba(10,106,122,.45);}
.band--paper a:hover{color:#084c58;}
.band--paper :focus-visible{outline-color:#0a6a7a;}
.band--paper .tag{color:#0a6a7a;border-color:#b6cad8;background:rgba(10,106,122,.08);}

.prose{max-width:34em;}
.prose p{margin-bottom:1.2em;}
.prose h2,.prose h3{margin-top:1.6em;}
.prose ul,.prose ol{max-width:34em;}

.lede{
  font-size:clamp(1.02rem,1.6vw,1.2rem);
  line-height:1.75;
  color:var(--fog);
  max-width:34em;
}
.band--paper .lede{color:#2b3f52;}

/* ---------- 等宽索引元素 ---------- */

.mono{
  font-family:var(--mono);
  font-size:.78em;
  letter-spacing:.1em;
  font-variant-numeric:tabular-nums;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.16em .62em;
  border:1px solid var(--line-600);
  background:rgba(0,229,255,.07);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--hot{border-color:rgba(255,107,53,.62);background:rgba(255,107,53,.12);color:var(--coral);}
.tag--mute{border-color:var(--line-600);background:transparent;color:var(--mist);}
.tag--ok{border-color:rgba(57,217,138,.55);background:rgba(57,217,138,.1);color:var(--green);}

/* ---------- 刊头 ---------- */

.masthead{
  position:sticky;
  top:0;
  z-index:var(--z-head);
  background:linear-gradient(180deg,#0B1A2F 0%,#0d2039 72%,#0f243f 100%);
  border-bottom:1px solid var(--line-600);
  box-shadow:0 22px 44px -34px rgba(0,0,0,.95);
}

.masthead__inner{
  max-width:var(--wt);
  margin:0 auto;
  padding:0 var(--gut);
}

.masthead__top{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:58px;
  padding:14px 0 10px;
}

.masthead__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:3px;
  padding:4px 12px;
  color:var(--fog);
  text-decoration:none;
}
.masthead__brand:hover{color:var(--fog);}

.masthead__wordmark{
  font-size:clamp(1.15rem,2.4vw,1.5rem);
  font-weight:800;
  letter-spacing:.2em;
  padding-left:.2em;
  line-height:1.1;
}

.masthead__mark{
  font-family:var(--mono);
  font-size:.6rem;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}

.nav-toggle{
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  min-width:44px;
  padding:.5rem .7rem;
  background:transparent;
  border:1px solid var(--line-600);
  border-radius:var(--r);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--fog);background:rgba(0,229,255,.08);}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),top .2s var(--ease);
}
.nav-toggle__bars::before{top:-5px;}
.nav-toggle__bars::after{top:5px;}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);}

.nav-toggle__text{line-height:1;}

.site-nav{
  overflow:hidden;
  max-height:0;
  transition:max-height .3s var(--ease);
  overscroll-behavior:contain;
}
.site-nav[data-open]{
  max-height:76vh;
  overflow-y:auto;
  border-top:1px solid var(--line-600);
}

.site-nav__list{
  display:flex;
  flex-direction:column;
  align-items:stretch;
  list-style:none;
  margin:0;
  padding:6px 0 14px;
}

.site-nav__item{margin:0;}

.site-nav__link{
  display:flex;
  align-items:center;
  gap:.6rem;
  min-height:44px;
  padding:.55rem 12px;
  border-left:2px solid transparent;
  border-bottom:1px solid rgba(44,74,110,.42);
  color:var(--mist);
  font-size:.92rem;
  text-decoration:none;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.site-nav__link:hover{
  color:var(--fog);
  background:rgba(0,229,255,.07);
}

.site-nav__num{
  font-family:var(--mono);
  font-size:.64rem;
  letter-spacing:.1em;
  color:var(--line-600);
  transition:color .18s var(--ease);
}
.site-nav__link:hover .site-nav__num{color:var(--cyan);}

.site-nav__link[aria-current="page"]{
  color:var(--fog);
  border-left-color:var(--cyan);
  border-bottom-color:rgba(44,74,110,.42);
  background:rgba(0,229,255,.09);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--cyan);}

.masthead__bar{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:var(--cyan);
  opacity:.9;
  transform:scaleX(0);
  transform-origin:left center;
  pointer-events:none;
}

@media (max-width:899px){
  .masthead__top{padding-left:64px;padding-right:64px;}
}

@media (min-width:900px){
  .masthead__top{padding:16px 0 12px;}
  .nav-toggle{display:none;}
  .site-nav{
    max-height:none;
    overflow:visible;
    border-top:1px solid rgba(44,74,110,.6);
  }
  .site-nav__list{
    flex-direction:row;
    flex-wrap:wrap;
    justify-content:center;
    align-items:stretch;
    padding:0;
  }
  .site-nav__link{
    align-items:baseline;
    gap:.5rem;
    min-height:46px;
    padding:.72rem clamp(12px,2.2vw,24px);
    border-left:0;
    border-bottom:2px solid transparent;
    font-size:.94rem;
  }
  .site-nav__link[aria-current="page"]{
    border-left:0;
    border-bottom-color:var(--cyan);
    background:rgba(0,229,255,.07);
  }
}

/* ---------- 页脚 ---------- */

.site-foot{
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,#0B1A2F 0%,#08131f 100%);
  border-top:1px solid var(--line-600);
  color:var(--mist);
}
.site-foot::before{
  content:"";
  display:block;
  height:5px;
  background:linear-gradient(90deg,var(--cyan) 0,rgba(0,229,255,0) 38%,rgba(255,107,53,0) 62%,var(--coral) 100%);
}

.site-foot__inner{
  max-width:var(--wt);
  margin:0 auto;
  padding:clamp(30px,5vw,54px) var(--gut) 0;
}

.site-foot__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,4vw,48px);
  padding-bottom:clamp(24px,3vw,36px);
}

.foot-col{min-width:0;}

.foot-col__title{
  display:flex;
  align-items:center;
  gap:12px;
  margin:0 0 16px;
  font-family:var(--mono);
  font-size:.66rem;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.foot-col__title::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:var(--line-600);
}

.foot-col p{
  margin:0 0 18px;
  max-width:36ch;
  font-size:.9rem;
  line-height:1.78;
  color:var(--mist);
}

.foot-index{
  display:grid;
  grid-template-columns:1fr;
  gap:2px;
  list-style:none;
  margin:0;
  padding:0;
}

.foot-index__link{
  display:flex;
  align-items:center;
  gap:.6rem;
  min-height:44px;
  padding:.35rem 0;
  border-bottom:1px dashed rgba(44,74,110,.55);
  color:var(--mist);
  font-size:.92rem;
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.foot-index__link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}

.foot-index__num{
  font-family:var(--mono);
  font-size:.64rem;
  letter-spacing:.1em;
  color:var(--line-600);
}

.foot-meta{
  display:grid;
  gap:8px;
  list-style:none;
  margin:0 0 20px;
  padding:0;
  font-size:.86rem;
}
.foot-meta li{display:flex;gap:10px;align-items:flex-start;}

.foot-meta__key{
  flex:0 0 46px;
  padding-top:.28em;
  font-family:var(--mono);
  font-size:.62rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--line-600);
}

.foot-meta__val{color:var(--mist);word-break:break-word;}

.foot-legal{
  display:flex;
  flex-wrap:wrap;
  gap:0 20px;
  list-style:none;
  margin:0;
  padding:0;
}

.foot-legal__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  color:var(--cyan);
  font-size:.86rem;
  letter-spacing:.03em;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.foot-legal__link:hover{color:var(--cyan-soft);border-bottom-color:var(--cyan-soft);}

.site-foot__base{
  display:flex;
  flex-wrap:wrap;
  gap:8px 26px;
  justify-content:space-between;
  align-items:center;
  padding:16px 0 26px;
  border-top:1px solid rgba(44,74,110,.65);
}

.foot-base__item{
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}

.foot-base__num{color:var(--cyan);}

@media (min-width:640px){
  .foot-index{grid-template-columns:1fr 1fr;gap:2px 22px;}
}

@media (min-width:900px){
  .site-foot__grid{grid-template-columns:1.05fr 1.2fr 1fr;}
}

/* ---------- 通用按钮 ---------- */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  min-height:44px;
  padding:.65rem 1.2rem;
  border:1px solid transparent;
  border-radius:var(--r);
  font-family:var(--sans);
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.05em;
  line-height:1.3;
  text-decoration:none;
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--coral);color:#1b0d05;}
.btn--primary:hover{background:var(--coral-soft);color:#1b0d05;}
.btn--cyan{background:var(--cyan);color:#04121f;}
.btn--cyan:hover{background:var(--cyan-soft);color:#04121f;}
.btn--ghost{border-color:var(--line-600);background:transparent;color:var(--cyan);}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(0,229,255,.1);color:var(--fog);}

/* ---------- 面包屑 ---------- */

.crumbs{margin:0 0 22px;}

.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 .5rem;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--mono);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}
.crumbs__list li{display:inline-flex;align-items:center;gap:.5rem;}
.crumbs__list li+li::before{content:"/";color:var(--line-600);}

.crumbs__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  color:var(--mist);
  text-decoration:none;
}
.crumbs__link:hover{color:var(--cyan);}

.crumbs__current{color:var(--fog);}

/* ---------- 章节标题条 ---------- */

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:.5rem clamp(12px,2vw,20px);
  padding-bottom:12px;
  margin-bottom:clamp(20px,3vw,32px);
  border-bottom:1px solid var(--line-600);
}

.section-head__num{
  font-family:var(--mono);
  font-size:.7rem;
  letter-spacing:.22em;
  color:var(--cyan);
}

.section-head__title{
  margin:0;
  font-size:clamp(1.28rem,2.6vw,1.9rem);
  letter-spacing:.035em;
}

.section-head__hint{
  margin-left:auto;
  font-size:.84rem;
  color:var(--mist);
}

/* ---------- 面板与卡片 ---------- */

.panel{
  position:relative;
  padding:clamp(16px,3vw,26px);
  background:var(--ink-800);
  border:1px solid var(--line-600);
}
.panel--paper{background:var(--paper);border-color:#c6d6e3;color:var(--paper-ink);}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:var(--paper-ink);}
.panel--paper a{color:#0a6a7a;}
.panel--edge{clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);}
.panel--coral{border-top:2px solid var(--coral);}

/* ---------- 图片容器 ---------- */

.figure-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-800);
  border:1px solid var(--line-600);
}

.figure-frame > img,
.figure-frame > svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.figure-frame__ph{
  display:block;
  width:100%;
  min-height:190px;
  background:
    repeating-linear-gradient(90deg,rgba(0,229,255,.07) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(0,229,255,.07) 0 1px,transparent 1px 44px),
    linear-gradient(140deg,var(--ink-700) 0%,var(--ink-800) 58%,#0e2036 100%);
}

.figure-frame__cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:12px 14px 10px;
  font-family:var(--mono);
  font-size:.64rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--fog);
  background:linear-gradient(0deg,rgba(11,26,47,.94) 0,rgba(11,26,47,0) 100%);
}

.figure-frame--cut-br{clip-path:polygon(0 0,100% 0,100% calc(100% - 28px),0 100%);}
.figure-frame--cut-tr{clip-path:polygon(0 0,100% 16px,100% 100%,0 100%);}

/* ---------- 滚动显现（JS 协议 data-reveal / data-revealed） ---------- */

[data-reveal][data-revealed]{
  animation:lj-reveal .55s var(--ease) both;
}

@keyframes lj-reveal{
  from{opacity:.32;transform:translateY(10px);}
  to{opacity:1;transform:none;}
}

/* ---------- 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;
  }
  .site-nav{transition:none;}
  [data-reveal][data-revealed]{animation:none;opacity:1;transform:none;}
}