/* =========================================================
   乐竟赛场 · /assets/site.css
   全站共享：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
button{background:none;border:0;cursor:pointer;font:inherit;color:inherit}
table{border-collapse:collapse}
main{display:block}

:root{
  --ink:#0B0D0E;
  --panel:#14181A;
  --line:#232A2D;
  --cyan:#35F2D0;
  --cyan-deep:#0E6B5E;
  --amber:#FFA23A;
  --amber-ink:#A85A00;
  --red:#FF3B4E;
  --cream:#F2E9D8;
  --brown:#2A2018;
  --white:#E8EDEE;
  --mist:#8A969A;
  --teal-ink:#062B26;

  --shell:1280px;
  --gut:clamp(16px,4vw,40px);
  --r-sm:4px;
  --r-md:10px;
  --r-pill:999px;
  --shadow-soft:0 26px 60px -44px #000;
  --nav-bp:1023px;

  --font-display:"Oswald","Arial Narrow","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

html{scroll-behavior:smooth}

body{
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 520px at 10% -10%, rgba(53,242,208,.07), transparent 62%),
    radial-gradient(900px 460px at 98% 2%, rgba(255,162,58,.055), transparent 60%);
  background-repeat:no-repeat;
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.08;
  letter-spacing:.02em;
  text-transform:uppercase;
  color:var(--white);
}

p,li,dd{line-height:1.75}
p{margin:0}

a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
::selection{background:var(--cyan);color:var(--ink)}

.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}

/* ---------- 布局基元 ---------- */
.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gut)}
.section{position:relative;padding-block:clamp(48px,8vw,104px)}
.section--panel{background:var(--panel);border-block:1px solid var(--line)}
.section--cream{
  background-color:var(--cream);
  background-image:repeating-linear-gradient(0deg, rgba(42,32,24,.05) 0 1px, transparent 1px 4px);
  color:var(--brown);
}
.section--cream h1,.section--cream h2,.section--cream h3{color:var(--brown)}
.section--cream .eyebrow{color:var(--amber-ink)}
.section--cream .sec-title{color:var(--brown)}
.page-head{padding-top:clamp(28px,5vw,64px)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.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--sidebar{grid-template-columns:minmax(0,300px) minmax(0,1fr)}

.stack{display:flex;flex-direction:column;gap:var(--stack,16px)}

.rule{height:1px;border:0;background:var(--line);margin:0}
.rule--cyan{background:linear-gradient(90deg,var(--cyan) 0%,rgba(53,242,208,0) 72%)}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:currentColor;display:inline-block}

.display{
  font-family:var(--font-display);
  font-size:clamp(2.75rem,8vw,6rem);
  line-height:.94;letter-spacing:.02em;text-transform:uppercase;
  color:var(--white);
}
.sec-title{
  font-family:var(--font-display);
  font-size:clamp(1.75rem,3.6vw,2.4rem);
  line-height:1.1;letter-spacing:.02em;text-transform:uppercase;
  color:var(--white);
}
.lede{font-size:clamp(1rem,1.5vw,1.125rem);color:var(--white);max-width:58ch}

/* ---------- 面包屑 ---------- */
.crumbs{margin-bottom:clamp(16px,3vw,28px)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--mist)}
.crumbs__item{display:flex;align-items:center}
.crumbs__item + .crumbs__item::before{content:"/";margin:0 .7em;color:#3A4548}
.crumbs__link{color:var(--mist);transition:color .2s ease}
.crumbs__link:hover{color:var(--cyan)}
.crumbs__current{color:var(--white)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:.72em 1.3em;
  font-family:var(--font-display);
  font-size:14px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;
  color:var(--white);
  background:transparent;
  border:1px solid var(--line);border-radius:var(--r-sm);
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--cyan-deep)}
.btn--solid{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.btn--solid:hover{background:#5FF6DA}
.btn--ghost{color:var(--white);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.section--cream .btn--ghost{color:var(--brown);border-color:rgba(42,32,24,.36)}
.section--cream .btn--ghost:hover{border-color:var(--brown);color:var(--brown);box-shadow:4px 4px 0 rgba(42,32,24,.28)}

/* ---------- 面板 / 标签 / 读数 ---------- */
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:clamp(18px,3vw,28px);
  box-shadow:var(--shadow-soft);
}
.panel--flat{box-shadow:none}
.panel--cut{border-radius:0;clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%)}

.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.28em .62em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--cyan);background:var(--teal-ink);
  border:1px solid rgba(53,242,208,.28);border-radius:2px;white-space:nowrap;
}
.tag--amber{color:var(--amber);background:rgba(255,162,58,.14);border-color:rgba(255,162,58,.4)}
.tag--alert{color:#FF8D99;background:rgba(255,59,78,.16);border-color:rgba(255,59,78,.45)}
.tag--solid{color:var(--ink);background:var(--cyan);border-color:var(--cyan);font-weight:700}

.stat{display:flex;flex-direction:column;gap:.35em}
.stat__value{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.6rem,4vw,2.4rem);line-height:1;color:var(--cyan);font-variant-numeric:tabular-nums}
.stat__unit{font-size:.5em;color:var(--mist);margin-left:.35em;letter-spacing:.06em}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--mist)}
.section--cream .stat__label{color:#6B5946}
.section--cream .stat__value{color:var(--amber-ink)}

/* ---------- 数据表 ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel)}
.metric-table{width:100%;font-size:14px}
.metric-table caption{text-align:left;padding:14px 16px 10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--mist)}
.metric-table th{
  padding:10px 14px;text-align:left;white-space:nowrap;
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--mist);
  border-bottom:1px solid var(--line);
}
.metric-table td{padding:11px 14px;border-bottom:1px solid rgba(35,42,45,.75);color:var(--white);vertical-align:middle}
.metric-table tbody tr:nth-child(even){background:var(--teal-ink)}
.metric-table tbody tr:hover{background:rgba(53,242,208,.07)}
.metric-table tbody tr:last-child td{border-bottom:0}
.metric-table .num,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--cyan);text-align:right;letter-spacing:0}
.metric-table .is-alert{color:#FF8D99}

/* ---------- 图片容器 ---------- */
.img-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);border-radius:var(--r-md);
  background-image:linear-gradient(140deg,#101617 0%,#0B0D0E 55%,#062B26 100%);
}
.img-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.72) contrast(1.06)}
.img-frame--wide{aspect-ratio:21 / 9}
.img-frame--tall{aspect-ratio:4 / 5}
.img-frame--square{aspect-ratio:1 / 1}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(180deg,rgba(11,13,14,0) 45%,rgba(11,13,14,.82) 100%),
    repeating-linear-gradient(90deg,rgba(53,242,208,.14) 0 1px,transparent 1px 64px);
}
.img-frame__caption{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--white);
}
.img-frame__caption::before{content:"▚ ";color:var(--cyan)}

/* ---------- 页头：悬浮胶囊导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:clamp(8px,1.4vw,14px) var(--gut) 0;
  background-image:linear-gradient(180deg,rgba(11,13,14,.97) 0%,rgba(11,13,14,.82) 62%,rgba(11,13,14,0) 100%);
  transition:padding .26s ease;
}
.site-header[data-scrolled]{padding-top:6px}

.read-bar{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(35,42,45,.65);overflow:hidden}
.read-bar__fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan-deep),var(--cyan));transition:width .12s linear}

.capsule{
  position:relative;
  max-width:var(--shell);margin:0 auto;
  display:flex;align-items:center;gap:clamp(8px,1.6vw,20px);
  padding:8px 10px 8px 12px;
  background:rgba(20,24,26,.95);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:0 26px 50px -34px #000, inset 0 1px 0 rgba(232,237,238,.06);
  transition:padding .26s ease,border-color .26s ease,box-shadow .26s ease,background-color .26s ease;
}
.site-header[data-scrolled] .capsule{padding:5px 8px 5px 10px;border-color:rgba(53,242,208,.3);box-shadow:0 18px 36px -28px #000}

.capsule__brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:2px 4px}
.capsule__mark{
  display:grid;place-items:center;width:34px;height:34px;flex:0 0 auto;
  background:var(--cyan);color:var(--ink);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.capsule__text{display:flex;flex-direction:column;line-height:1.16}
.capsule__name{font-family:var(--font-display);font-size:17px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--white);transition:color .2s ease}
.capsule__brand:hover .capsule__name{color:var(--cyan)}
.capsule__sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mist);transition:opacity .2s ease}
.site-header[data-scrolled] .capsule__sub{opacity:0}

.capsule__toggle{
  display:none;align-items:center;gap:8px;margin-left:auto;
  padding:8px 14px;border:1px solid var(--line);border-radius:var(--r-pill);
  color:var(--white);font-family:var(--font-display);font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  transition:border-color .2s ease,color .2s ease;
}
.capsule__toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.capsule__toggle-bars{position:relative;display:block;width:16px;height:10px}
.capsule__toggle-bars::before,.capsule__toggle-bars::after{content:"";position:absolute;left:0;right:0;height:2px;background:var(--cyan);transition:transform .2s ease}
.capsule__toggle-bars::before{top:0}
.capsule__toggle-bars::after{bottom:0}
.site-header[data-open] .capsule__toggle-bars::before{transform:translateY(4px) rotate(45deg)}
.site-header[data-open] .capsule__toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

.nav-panel{display:flex;align-items:center;justify-content:space-between;gap:clamp(8px,1.6vw,20px);flex:1 1 auto;min-width:0}

.nav__list{display:flex;align-items:center;gap:clamp(2px,.5vw,6px)}
.nav__item{display:block}
.nav__link{
  position:relative;display:block;padding:8px 11px;border-radius:var(--r-pill);
  font-family:var(--font-display);font-size:14px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mist);white-space:nowrap;
  transition:color .2s ease,background-color .2s ease;
}
.nav__link:hover{color:var(--white);background:rgba(53,242,208,.08)}
.nav__link[aria-current="page"]{color:var(--cyan)}
.nav__link[aria-current="page"]::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;background:var(--cyan)}

.quick{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.quick__link{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
  padding:6px 4px;border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.quick__link::before{content:"›";margin-right:.4em;color:var(--amber)}
.quick__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.quick__cta{
  display:inline-flex;align-items:center;justify-content:center;gap:.4em;
  padding:9px 17px;border-radius:var(--r-pill);
  background:var(--cyan);color:var(--ink);
  font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.quick__cta:hover{background:#5FF6DA;transform:translateY(-2px);box-shadow:0 6px 0 -1px var(--cyan-deep)}

.skip-link{
  position:absolute;left:50%;top:4px;z-index:120;
  transform:translate(-50%,-170%);
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--cyan);color:var(--ink);
  font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background:var(--panel);
  border-top:2px solid var(--line);
  color:var(--white);
}
.site-footer::before{
  content:"";position:absolute;top:-2px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan) 0 18%,var(--amber) 18% 29%,var(--red) 29% 33%,transparent 33%);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(40px,6vw,72px);
}
.foot-brand{max-width:42ch}
.foot-brand__name{font-family:var(--font-display);font-size:clamp(1.5rem,3vw,2rem);letter-spacing:.04em;text-transform:uppercase;color:var(--white)}
.foot-brand__name::after{content:"";display:block;width:54px;height:3px;margin-top:12px;background:var(--cyan)}
.foot-brand__sub{margin-top:16px;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--mist)}
.foot-brand__note{margin-top:14px;font-size:14px;line-height:1.75;color:var(--mist)}
.foot-brand .btn{margin-top:22px}

.foot-col__title{margin-bottom:14px;font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--amber)}
.foot-col__list{display:flex;flex-direction:column;gap:10px}
.foot-link{display:inline-block;font-size:15px;color:var(--white);transition:color .2s ease,transform .2s ease}
.foot-link:hover{color:var(--cyan);transform:translateX(4px)}

.foot-meta{background:var(--cream);color:var(--brown);border-top:1px solid rgba(42,32,24,.2)}
.foot-meta__inner{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 26px;padding-block:16px;font-size:13px}
.foot-meta__contact,.foot-meta__phone{font-family:var(--font-mono);letter-spacing:.02em}
.foot-meta__addr,.foot-meta__hours{color:#5A4A3A}
.foot-meta__icp{margin-left:auto;font-family:var(--font-mono);font-size:12px;color:#5A4A3A}

/* ---------- 动效协议 ---------- */
html[data-js="on"] [data-reveal]{opacity:0;transform:translateY(12px)}
html[data-js="on"] [data-reveal].is-in{opacity:1;transform:none;transition:opacity .24s ease,transform .24s ease}
[data-rail-link].is-active{color:var(--cyan)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .capsule{flex-wrap:wrap;border-radius:22px;padding:8px 10px}
  .capsule__toggle{display:inline-flex}
  .nav-panel{
    display:none;flex-basis:100%;width:100%;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:4px;
    margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);
  }
  .site-header[data-open] .nav-panel{display:flex}
  .nav{width:100%}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{padding:12px 8px;border-radius:8px;font-size:15px;border-bottom:1px solid rgba(35,42,45,.7)}
  .nav__link[aria-current="page"]::after{left:8px;right:auto;width:16px;bottom:6px}
  .quick{flex-direction:column;align-items:stretch;gap:8px;margin-top:10px}
  .quick__link{padding:10px 4px;border-bottom:1px solid rgba(35,42,45,.7)}
  .quick__cta{padding:12px 16px}
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .foot-brand{grid-column:1 / -1;max-width:none}
}

@media (max-width:620px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .capsule__sub{display:none}
  .capsule__mark{width:30px;height:30px;font-size:12px}
  .capsule__name{font-size:15px}
  .foot-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .foot-meta__icp{margin-left:0}
  .display{font-size:clamp(2.4rem,11vw,3.4rem)}
}

@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[data-js="on"] [data-reveal]{opacity:1 !important;transform:none !important}
  .btn:hover,.quick__cta:hover,.foot-link:hover{transform:none}
}