/* ==========================================================================
   乐优体育 · 共享样式 /assets/site.css
   深空蓝基底 + 蓝图坐标网格 + 荧光绿数据高亮 + 青海经幡点缀
   ========================================================================== */

/* ---------- 01 Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,hr{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
hr{border:0}

/* ---------- 02 变量 ---------- */
:root{
  --ink:#081320;
  --panel:#10203A;
  --lime:#39FF88;
  --orange:#FF7A2F;
  --signal:#FFD166;
  --steel:#8A9BB4;
  --mist:#E8EFF7;
  --teal:#0E5A6B;
  --sutra-blue:#2E6FBF;
  --sutra-green:#2FA36B;
  --sutra-yellow:#F2C14E;
  --sutra-red:#E4572E;

  --line:rgba(138,155,180,.22);
  --line-soft:rgba(138,155,180,.12);
  --line-lime:rgba(57,255,136,.42);

  --shell:1240px;
  --rail-w:252px;
  --bbar:112px;

  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --pill:999px;

  --mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ease:cubic-bezier(.22,.7,.2,1);
}

/* ---------- 03 基础排版与蓝图底纹 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 88% -12%,rgba(57,255,136,.10),transparent 62%),
    radial-gradient(900px 560px at -14% 6%,rgba(255,122,47,.09),transparent 60%),
    linear-gradient(rgba(138,155,180,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(138,155,180,.055) 1px,transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-attachment:fixed;
  color:var(--mist);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.02em;line-height:1.08;color:#fff}
h1{font-size:clamp(2.2rem,6vw,5.5rem)}
h2{font-size:clamp(1.55rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.12rem,1.9vw,1.5rem)}
strong{font-weight:800;color:#fff}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.01em}
.anno{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--steel)}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(1rem,4vw,2.5rem)}

:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
html.is-nav-open{overflow:hidden}

/* ---------- 04 Skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-200%);
  padding:.6rem 1.1rem;border-radius:var(--pill);
  background:var(--lime);color:#04121A;font-weight:800;font-size:.85rem;
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 05 页头：品牌说明层 ---------- */
.site-header{position:relative;z-index:74}

.brandbar{
  position:sticky;top:0;z-index:90;
  background:rgba(8,19,32,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.brandbar::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:repeating-linear-gradient(90deg,rgba(138,155,180,.5) 0 1px,transparent 1px 14px);
  opacity:.45;pointer-events:none;
}
.site-header[data-scrolled="true"] .brandbar{
  background:rgba(7,16,28,.96);
  box-shadow:0 22px 44px -34px rgba(0,0,0,.95);
}
.brandbar__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1rem;
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(.55rem,1.4vw,.8rem) clamp(1rem,4vw,2.5rem);
}

.brand{display:flex;align-items:center;gap:.7rem;min-width:0}
.brand__mark{
  position:relative;display:grid;place-items:center;
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(140deg,var(--lime),var(--teal));
  color:#04121A;font-family:var(--mono);font-weight:700;font-size:.8rem;
}
.brand__mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:9px;height:9px;border-radius:3px;
  background:var(--orange);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16;min-width:0}
.brand__name{font-weight:900;font-size:1.06rem;color:#fff}
.brand__tagline{
  font-size:.72rem;color:var(--steel);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw;
}

.quickbar{display:flex;align-items:center;gap:.55rem;margin-left:auto;min-width:0}
.quickbar__label{font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;color:var(--steel);opacity:.7}
.quickbar__list{display:flex;gap:.45rem}

.chip{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.34rem .78rem;border-radius:var(--pill);
  border:1px solid rgba(138,155,180,.3);
  background:rgba(16,32,58,.62);
  color:var(--steel);font-size:.8rem;font-weight:600;white-space:nowrap;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.chip__idx{font-family:var(--mono);font-size:.66rem;color:var(--orange)}
.chip:hover{border-color:var(--line-lime);background:rgba(57,255,136,.09);color:#fff}

.navtoggle{
  display:inline-flex;align-items:center;gap:.5rem;margin-left:auto;
  padding:.5rem .95rem;border-radius:var(--pill);
  border:1px solid var(--line-lime);color:var(--lime);
  font-size:.84rem;font-weight:800;letter-spacing:.04em;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.navtoggle:hover{background:rgba(57,255,136,.12)}
.navtoggle__bars{position:relative;width:16px;height:10px}
.navtoggle__bars::before,
.navtoggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:transform .2s var(--ease);
}
.navtoggle__bars::before{top:0}
.navtoggle__bars::after{bottom:0}
.navtoggle[aria-expanded="true"] .navtoggle__bars::before{transform:translateY(4px) rotate(45deg)}
.navtoggle[aria-expanded="true"] .navtoggle__bars::after{transform:translateY(-4px) rotate(-45deg)}

/* ---------- 06 页头：栏目索引导轨（桌面常驻 / 移动侧滑） ---------- */
.rail{
  position:fixed;top:0;bottom:0;left:0;z-index:80;
  width:min(86vw,340px);
  display:flex;flex-direction:column;gap:1rem;
  padding:calc(var(--bbar) + 10px) 20px 24px;
  background:linear-gradient(180deg,#0A1728,#07111E 58%,#050C15);
  border-right:1px solid var(--line);
  overflow-y:auto;overscroll-behavior:contain;
  transform:translateX(-102%);
  transition:transform .26s var(--ease);
  box-shadow:0 30px 80px -34px rgba(0,0,0,.95);
}
.rail[data-open="true"]{transform:none}

.rail__caption{
  display:flex;align-items:center;gap:.6rem;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;
  color:var(--steel);opacity:.85;text-transform:uppercase;
}
.rail__caption::after{content:"";flex:1;height:1px;background:var(--line)}

.rail__list{display:flex;flex-direction:column;gap:3px}
.rail__link{
  position:relative;display:grid;grid-template-columns:1.7rem 1fr auto;
  align-items:center;gap:.6rem;
  padding:.6rem .75rem;border-radius:14px;border:1px solid transparent;
  color:var(--steel);font-size:.98rem;font-weight:700;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.rail__link::after{
  content:"";width:6px;height:6px;border-radius:50%;
  background:currentColor;opacity:.3;transition:opacity .18s var(--ease),background-color .18s var(--ease);
}
.rail__idx{font-family:var(--mono);font-size:.68rem;color:rgba(138,155,180,.72)}
.rail__label{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rail__link:hover{color:#fff;background:rgba(57,255,136,.07);border-color:var(--line-lime)}
.rail__link:hover::after{opacity:1;background:var(--lime)}
.rail__link[aria-current="page"]{
  color:#fff;background:rgba(57,255,136,.12);border-color:var(--line-lime);
  box-shadow:inset 3px 0 0 var(--lime);
}
.rail__link[aria-current="page"] .rail__idx{color:var(--lime)}
.rail__link[aria-current="page"]::after{opacity:1;background:var(--lime)}

.rail__cta{
  margin-top:auto;display:flex;flex-direction:column;gap:.6rem;
  padding-top:1rem;border-top:1px solid var(--line);
}
.rail__hint{font-size:.74rem;color:var(--steel);letter-spacing:.04em}
.rail__hint .mono{color:var(--lime)}
.rail__btn{width:100%;justify-content:center}

.nav-scrim{
  position:fixed;inset:0;z-index:76;
  background:rgba(4,10,18,.74);
  opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease);
}
.rail[data-open="true"] + .nav-scrim{opacity:1;pointer-events:auto}

/* ---------- 07 阅读进度 ---------- */
.read-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:200;
  pointer-events:none;background:rgba(138,155,180,.12);
}
.read-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--signal) 58%,var(--orange));
  transition:transform .12s linear;
}

/* ---------- 08 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(3rem,8vw,7rem);
  background:linear-gradient(180deg,rgba(16,32,58,.92),rgba(6,13,22,.99));
  border-top:1px solid var(--line);
  overflow:hidden;color:var(--steel);
}
.footer__sutra{display:grid;grid-template-columns:repeat(4,1fr);height:3px}
.footer__sutra span:nth-child(1){background:var(--sutra-blue);opacity:.85}
.footer__sutra span:nth-child(2){background:var(--sutra-green);opacity:.85}
.footer__sutra span:nth-child(3){background:var(--sutra-yellow);opacity:.85}
.footer__sutra span:nth-child(4){background:var(--sutra-red);opacity:.85}
.footer__ridge{
  position:absolute;top:3px;left:0;right:0;height:130px;pointer-events:none;opacity:.16;
  background:linear-gradient(180deg,rgba(46,111,191,.55),rgba(47,163,107,0));
  clip-path:polygon(0 100%,8% 62%,16% 78%,26% 40%,34% 66%,44% 30%,54% 58%,64% 34%,72% 64%,82% 46%,90% 70%,100% 52%,100% 100%);
}
.footer__inner{
  position:relative;display:grid;gap:clamp(1.6rem,4vw,2.6rem);
  grid-template-columns:1fr;
  padding-block:clamp(2.4rem,6vw,3.6rem);
}
.footer__brandblock{display:flex;flex-direction:column;gap:.6rem}
.footer__brand{font-size:1.4rem;font-weight:900;color:#fff;letter-spacing:-.01em}
.footer__desc{font-size:.92rem;max-width:34em;line-height:1.7}
.footer__stat{font-size:.78rem;letter-spacing:.06em;color:var(--steel)}
.footer__stat .mono{color:var(--orange);font-weight:700}

.footer__col{display:flex;flex-direction:column;gap:.7rem}
.footer__title{
  font-size:.72rem;font-weight:800;letter-spacing:.22em;
  font-family:var(--mono);color:var(--mist);text-transform:uppercase;
  padding-bottom:.5rem;border-bottom:1px solid var(--line);
}
.footer__list{display:flex;flex-direction:column;gap:.45rem}
.footer__list a{
  font-size:.92rem;color:var(--steel);
  transition:color .18s var(--ease),transform .18s var(--ease);
  display:inline-block;
}
.footer__list a:hover{color:var(--lime);transform:translateX(3px)}

.contact{display:flex;flex-direction:column;gap:.65rem}
.contact__row{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem;font-size:.88rem}
.contact__key{
  flex:0 0 3.2rem;font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--steel);opacity:.75;
}
.contact__val{color:var(--mist);word-break:break-all}
.copybtn{
  padding:.16rem .6rem;border-radius:var(--pill);
  border:1px solid rgba(138,155,180,.36);
  font-size:.72rem;color:var(--steel);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.copybtn:hover{border-color:var(--line-lime);color:var(--lime)}
.copybtn[data-state="ok"]{border-color:var(--line-lime);color:var(--lime);background:rgba(57,255,136,.12)}
.copybtn[data-state="fail"]{border-color:var(--orange);color:var(--orange)}
.footer__hint{font-size:.76rem;color:var(--steel);opacity:.8}

.footer__bottom{
  position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1.4rem;
  padding-block:1.1rem 1.6rem;border-top:1px solid var(--line-soft);
}
.footer__legal{font-size:.78rem;color:var(--steel)}
.footer__legal .mono{color:var(--lime)}
.footer__legalnav{display:flex;flex-wrap:wrap;gap:.5rem 1.1rem;margin-left:auto}
.footer__legalnav a{font-size:.78rem;color:var(--steel);transition:color .18s var(--ease)}
.footer__legalnav a:hover{color:var(--orange)}

/* ---------- 09 通用组件 ---------- */
.section{padding-block:clamp(2.2rem,5.5vw,4.5rem)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem 1rem;
  padding-top:1rem;border-top:1px solid var(--line);
  margin-bottom:clamp(1.2rem,3vw,2rem);
}
.section__idx{font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;color:var(--orange)}

.page-head{padding-block:clamp(1.6rem,5vw,3rem) clamp(.8rem,2vw,1.2rem)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.24em;
  color:var(--orange);text-transform:uppercase;
}

.grid{display:grid;gap:clamp(1rem,2.4vw,1.6rem)}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}

.panel{
  background:linear-gradient(180deg,rgba(16,32,58,.9),rgba(9,20,34,.92));
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(1.1rem,3vw,1.8rem);
}
.card{
  display:flex;flex-direction:column;gap:.6rem;
  background:linear-gradient(180deg,rgba(16,32,58,.86),rgba(9,20,34,.9));
  border:1px solid var(--line);border-radius:var(--r-md);
  padding:clamp(1rem,2.4vw,1.5rem);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--line-lime);
  box-shadow:0 26px 50px -34px rgba(57,255,136,.55);
}

.stat{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:clamp(1.7rem,4.2vw,2.8rem);line-height:1;color:var(--lime);font-weight:700;
}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.22rem .66rem;border-radius:var(--pill);
  border:1px solid rgba(138,155,180,.34);
  font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--steel);
}
.tag--orange{border-color:rgba(255,122,47,.5);color:var(--orange);background:rgba(255,122,47,.1)}
.tag--signal{border-color:rgba(255,209,102,.5);color:var(--signal);background:rgba(255,209,102,.1)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.72rem 1.35rem;border-radius:var(--pill);
  border:1px solid transparent;font-size:.94rem;font-weight:800;letter-spacing:.02em;
  transition:transform .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease),color .18s var(--ease);
}
.btn--primary{
  background:var(--lime);color:#04121A;
  box-shadow:0 14px 34px -22px rgba(57,255,136,.95);
}
.btn--primary:hover{transform:translateY(-2px);background:#5fff9f}
.btn--ghost{border-color:rgba(138,155,180,.42);color:var(--mist)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-2px)}
.btn--sm{padding:.5rem 1rem;font-size:.84rem}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.76rem;letter-spacing:.06em;color:var(--steel);
}
.breadcrumb a{transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb__sep{opacity:.5}

.prose{max-width:42em;font-size:1.02rem;line-height:1.78;color:#CBD8E8}
.prose p + p{margin-top:1rem}
.prose h2,.prose h3{margin-top:1.8rem;margin-bottom:.6rem}
.prose ul{display:flex;flex-direction:column;gap:.4rem;margin-top:.8rem}
.prose li{padding-left:1.1rem;position:relative}
.prose li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:6px;height:6px;border-radius:2px;background:var(--lime);
}

.divider{height:1px;background:var(--line);margin-block:clamp(1.4rem,4vw,2.4rem)}

/* ---------- 10 图片容器基础规则 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-md);border:1px solid var(--line);
  aspect-ratio:16 / 9;width:100%;
  background-color:var(--panel);
  background-image:
    linear-gradient(135deg,rgba(16,32,58,.92),rgba(8,19,32,.92)),
    repeating-linear-gradient(90deg,rgba(138,155,180,.16) 0 1px,transparent 1px 24px);
}
.media--wide{aspect-ratio:21 / 9}
.media--square{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:4 / 5}
.media__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media__cap{
  position:absolute;left:14px;bottom:12px;max-width:calc(100% - 28px);
  padding:.24rem .64rem;border-radius:var(--pill);
  background:rgba(8,19,32,.78);border:1px solid var(--line);
  font-size:.72rem;letter-spacing:.04em;color:var(--mist);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.media__tag{
  position:absolute;left:12px;top:12px;
  padding:.22rem .66rem;border-radius:var(--pill);
  background:rgba(255,122,47,.16);border:1px solid rgba(255,122,47,.55);
  color:var(--orange);font-size:.7rem;font-weight:800;letter-spacing:.06em;
}

/* ---------- 11 动效协议 ---------- */
html.js-ready [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.js-ready [data-reveal].is-inview{opacity:1;transform:none}

/* ---------- 12 断点：平板与桌面 ---------- */
@media (max-width:1139px){
  .quickbar{order:3;flex:1 1 100%;margin-left:0;overflow:hidden}
  .quickbar__label{display:none}
  .quickbar__list{overflow-x:auto;padding:2px 0 4px;scrollbar-width:none}
  .quickbar__list::-webkit-scrollbar{display:none}
}

@media (min-width:1140px){
  :root{--bbar:72px}
  body{padding-left:var(--rail-w)}
  .skip-link{left:calc(var(--rail-w) + 10px)}
  .rail{
    width:var(--rail-w);
    transform:none;
    z-index:72;
    padding:2.4rem 20px 24px;
    box-shadow:none;
  }
  .nav-scrim{display:none}
  .navtoggle{display:none}
  .read-progress{left:var(--rail-w)}
  html.is-nav-open{overflow:auto}
}

@media (min-width:720px){
  .footer__inner{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1040px){
  .footer__inner{grid-template-columns:1.7fr 1fr 1fr 1.6fr;align-items:start}
}

/* ---------- 13 减少动态偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .read-progress__bar{transition:none}
}