/* ============================================================
   乐鱼赛场 · 共享样式 /assets/site.css
   reset + tokens + 中文字体排印 + 头部 + 页脚 + 通用组件
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
img,svg{display:block;max-width:100%}
input[type="search"]{-webkit-appearance:none;appearance:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:2px}

/* ---------- tokens ---------- */
:root{
  --ink:#07090C;
  --ink-2:#0E1620;
  --ink-3:#131E29;
  --white:#F4F7FA;
  --grey:#8C99A8;
  --blue:#21B6E8;
  --cyan:#4BF0D0;
  --orange:#FF5A2B;
  --yellow:#FFD400;
  --red:#FF2E4D;
  --corner-low:#1E8BFF;
  --corner-high:#2BE3A4;
  --glass:#FFFFFF1F;
  --line:rgba(140,153,168,.22);
  --shell-w:1320px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05),0 12px 32px rgba(0,0,0,.5);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-cond:"Barlow Condensed","Oswald","Arial Narrow","Noto Sans SC",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}

/* ---------- base ---------- */
body{
  background:
    radial-gradient(120% 70% at 50% -10%,rgba(33,182,232,.10),transparent 62%),
    radial-gradient(90% 60% at 100% 100%,rgba(75,240,208,.06),transparent 60%),
    var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.12}
h1{font-size:40px}
h2{font-size:32px}
h3{font-size:24px}
h4{font-size:18px}
p{text-wrap:pretty}
strong{font-weight:900;color:var(--white)}
a{transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
.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}

/* ---------- 跳至正文 ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:200;
  background:var(--cyan);color:#062028;font-weight:700;font-size:14px;
  padding:10px 16px;border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 布局容器 ---------- */
.shell{width:min(100% - 32px,var(--shell-w));margin-inline:auto}
.section{padding:52px 0}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;
  padding-bottom:14px;margin-bottom:24px;border-bottom:1px solid var(--line);
}
.section__title{font-size:32px}
.section__kicker{
  display:block;font-family:var(--font-cond);font-size:12px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--blue);margin-bottom:6px;
}
.band{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:14px 0;border-top:1px solid var(--glass);border-bottom:1px solid var(--glass);
  background:linear-gradient(90deg,rgba(14,22,32,.9),rgba(7,9,12,.4));
}
.grid{display:grid;gap:18px}
.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))}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(14,22,32,.97),rgba(7,9,12,.93));
  border-bottom:1px solid var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,182,232,.7),rgba(75,240,208,.7),transparent);
  opacity:.55;pointer-events:none;
}
.header__bar{
  display:flex;align-items:center;gap:20px;
  min-height:76px;padding:10px 0;
  transition:min-height .22s var(--ease);
}
.site-header.is-condensed .header__bar{min-height:56px}

.brand-lockup{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--white)}
.brand__mark{position:relative;width:20px;height:20px;flex:none}
.brand__mark::before{content:"";position:absolute;inset:0;border-left:2px solid var(--blue);border-bottom:2px solid var(--blue)}
.brand__mark::after{content:"";position:absolute;inset:0;border-right:2px solid var(--cyan);border-top:2px solid var(--cyan)}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:20px;letter-spacing:-.02em;line-height:1;white-space:nowrap}
.brand__tagline{font-size:12px;line-height:1.4;color:var(--grey);letter-spacing:.06em;white-space:nowrap}
.site-header.is-condensed .brand__tagline{display:none}

.nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  background:rgba(244,247,250,.04);border:1px solid var(--glass);border-radius:2px;
  padding:9px 12px;cursor:pointer;
  font-family:var(--font-cond);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--white);transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--blue);color:var(--cyan)}
.nav-toggle__bars{position:relative;width:16px;height:10px;flex:none}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--cyan);
  transition:transform .22s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}

.site-nav{display:flex;align-items:center;gap:16px;margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.site-nav__item.is-filtered-out{display:none}
.site-nav__link{
  display:block;padding:8px 11px;border:1px solid transparent;border-radius:2px;
  font-size:13.5px;color:var(--white);white-space:nowrap;
}
.site-nav__link:hover{color:var(--cyan);border-color:var(--glass);background:rgba(33,182,232,.10)}
.site-nav__link[aria-current="page"]{
  background:var(--cyan);color:#052029;font-weight:700;border-color:var(--cyan);
}
.site-nav__empty{display:none;font-size:13px;color:var(--grey);padding:6px 2px}
.site-nav__empty:not([hidden]){display:block}

.site-nav__tools{display:flex;align-items:center;gap:12px}
.site-search{display:flex;align-items:center}
.site-search__input{
  width:150px;padding:9px 12px;border-radius:2px;
  background:rgba(244,247,250,.05);border:1px solid var(--glass);
  color:var(--white);font-size:13px;line-height:1;
  transition:border-color .18s var(--ease),background-color .18s var(--ease),width .2s var(--ease);
}
.site-search__input::placeholder{color:var(--grey)}
.site-search__input:focus{width:190px;border-color:var(--blue);background:rgba(33,182,232,.12);outline:none}
.site-search__input:focus-visible{outline:2px solid var(--cyan);outline-offset:1px}

.header-tool{
  font-size:13px;color:var(--grey);border-bottom:1px solid transparent;
  padding:4px 2px;white-space:nowrap;
}
.header-tool:hover{color:var(--cyan);border-color:var(--cyan)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:2px;border:1px solid transparent;cursor:pointer;
  font-family:var(--font-display);font-weight:700;font-size:13.5px;letter-spacing:.02em;line-height:1;
  white-space:nowrap;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn--primary{background:var(--orange);color:#120704}
.btn--primary:hover{transform:translateY(-2px);background:#FF7048}
.btn--ghost{background:rgba(244,247,250,.04);border-color:var(--glass);color:var(--white)}
.btn--ghost:hover{border-color:var(--blue);color:var(--cyan);transform:translateY(-2px)}
.btn--cyan{background:var(--cyan);color:#052029}
.btn--cyan:hover{transform:translateY(-2px)}
.btn--block{width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--grey);padding:18px 0 0}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item a{color:var(--grey)}
.breadcrumb__item a:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--blue);opacity:.75}

/* ---------- 通用组件 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 9px;border-radius:2px;border:1px solid rgba(33,182,232,.45);
  background:rgba(33,182,232,.08);color:var(--blue);
  font-family:var(--font-cond);font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;line-height:1;
}
.tag--cyan{color:var(--cyan);border-color:rgba(75,240,208,.45);background:rgba(75,240,208,.08)}
.tag--warn{color:var(--yellow);border-color:rgba(255,212,0,.45);background:rgba(255,212,0,.10)}
.tag--red{color:var(--red);border-color:rgba(255,46,77,.45);background:rgba(255,46,77,.10)}

.card{
  position:relative;
  background:linear-gradient(180deg,rgba(14,22,32,.94),rgba(7,9,12,.94));
  border:1px solid var(--glass);border-radius:2px;
  padding:20px;box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.card:hover,.card:focus-within{transform:translateY(-4px);border-color:rgba(33,182,232,.5)}
.card__title{font-size:18px;font-weight:900;letter-spacing:-.01em;margin-bottom:6px}
.card__meta{font-size:12.5px;color:var(--grey);letter-spacing:.04em}
.card__media{margin:14px 0}
.card__fields{
  max-height:0;overflow:hidden;opacity:0;margin-top:0;
  border-top:1px solid transparent;
  transition:max-height .22s var(--ease),opacity .22s var(--ease),margin-top .22s var(--ease);
}
.card:hover .card__fields,.card:focus-within .card__fields,.card[data-locked] .card__fields{
  max-height:320px;opacity:1;margin-top:12px;border-top-color:var(--line);padding-top:12px;
}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__figure{
  font-family:var(--font-mono);font-weight:700;font-size:56px;line-height:1;letter-spacing:-.04em;
  color:var(--cyan);
}
.stat__label{
  font-family:var(--font-cond);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--grey);
}

.media{
  position:relative;overflow:hidden;border:1px solid var(--glass);border-radius:2px;
  aspect-ratio:16/9;
  background:
    radial-gradient(120% 90% at 18% 0%,rgba(33,182,232,.20),transparent 62%),
    linear-gradient(180deg,var(--ink-2),var(--ink));
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:
    linear-gradient(90deg,rgba(244,247,250,.10) 1px,transparent 1px),
    linear-gradient(0deg,rgba(244,247,250,.10) 1px,transparent 1px);
  background-size:34px 34px;
}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__caption{
  margin-top:8px;font-size:12.5px;color:var(--grey);letter-spacing:.03em;
}

.prose{max-width:72ch}
.prose p{margin:0 0 1.2em}
.prose h2{font-size:24px;margin:1.8em 0 .6em}
.prose h3{font-size:18px;margin:1.5em 0 .5em}
.prose a{color:var(--blue);border-bottom:1px solid rgba(33,182,232,.5)}
.prose a:hover{color:var(--cyan);border-color:var(--cyan)}
.prose ul,.prose ol{display:grid;gap:8px;margin:0 0 1.2em}
.prose li{position:relative;padding-left:18px}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--blue)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:80px;
  padding:56px 0 24px;
  background:linear-gradient(180deg,var(--ink-2),var(--ink));
  border-top:1px solid var(--glass);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,182,232,.8),rgba(75,240,208,.8),transparent);
  opacity:.55;
}
.footer__grid{
  display:grid;grid-template-columns:1.4fr 1fr 1.5fr 1fr;gap:32px;align-items:start;
}
.footer__col{min-width:0}
.footer__col--brand{display:flex;flex-direction:column;gap:12px}
.footer__identity{font-size:14px;color:var(--white);letter-spacing:.02em}
.footer__note{font-size:13px;color:var(--grey);line-height:1.7}
.footer__title{
  font-family:var(--font-cond);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}
.footer__links{display:grid;gap:9px}
.footer__links a{font-size:14px;color:var(--grey);border-bottom:1px solid transparent;display:inline-block}
.footer__links a:hover{color:var(--cyan);border-color:var(--cyan)}
.footer__contact{font-size:13px;color:var(--grey);line-height:1.7;margin-top:10px}
.footer__cta{margin-top:16px}
.footer__bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  margin-top:42px;padding-top:18px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--grey);letter-spacing:.03em;
}

/* ---------- 动效与状态 ---------- */
html.js-ready [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
html.js-ready [data-reveal].is-in{opacity:1;transform:none}
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:120;pointer-events:none;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .site-search{display:none}
}
@media (max-width:1080px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:1020px){
  .brand__tagline{display:none}
  .header__bar{min-height:62px}
  .site-nav__tools .btn--ghost{display:none}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  body.nav-open{overflow:hidden}
  .site-nav{
    position:fixed;left:0;right:0;bottom:0;top:auto;
    display:block;margin-left:0;
    max-height:78vh;overflow-y:auto;z-index:95;
    padding:20px 20px calc(28px + env(safe-area-inset-bottom,0px));
    background:linear-gradient(180deg,var(--ink-2),var(--ink));
    border-top:1px solid var(--glass);border-radius:2px 2px 0 0;
    box-shadow:0 -18px 44px rgba(0,0,0,.62);
    transform:translateY(102%);
    transition:transform .28s var(--ease);
  }
  .site-nav[data-open]{transform:translateY(0)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__item:first-child{border-top:1px solid var(--line)}
  .site-nav__link{padding:15px 4px;font-size:16px;border-radius:0;border-color:transparent}
  .site-nav__link:hover{background:transparent;border-color:transparent}
  .site-nav__link[aria-current="page"]{
    background:transparent;color:var(--cyan);font-weight:700;
    border-left:3px solid var(--cyan);padding-left:12px;
  }
  .site-nav__tools{flex-direction:column;align-items:stretch;gap:12px;margin-top:22px}
  .site-search{display:flex}
  .site-search__input{width:100%}
  .site-search__input:focus{width:100%}
  .header-tool{align-self:flex-start}
  .site-nav__tools .btn--ghost{display:inline-flex}
  .btn{justify-content:center}
}
@media (max-width:720px){
  h1{font-size:32px}
  h2{font-size:26px}
  .section{padding:40px 0}
  .section__title{font-size:26px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .site-footer{padding:44px 0 20px;margin-top:60px}
  .stat__figure{font-size:44px}
  .footer__bar{flex-direction:column;align-items:flex-start}
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .card:hover,.card:focus-within{transform:none}
  .btn:hover{transform:none}
}