/* ============================================================
   云体育·CN — 共享样式 /assets/site.css
   纸面 + 云端赛场 + 电子屏状态条
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
html,body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}
hr{border:0}

/* ---------- tokens ---------- */
:root{
  --paper:#F4F0E6;
  --paper-deep:#EAE4D6;
  --warm-white:#FBF8F1;
  --ink:#12222E;
  --ink-soft:#1C3341;
  --cloud:#7FB6D9;
  --sky:#2E6E96;
  --neon:#C6F24A;
  --orange:#C2410C;
  --orange-bright:#F2652B;
  --bluegray:#5B6B76;
  --mist:#D9E3E8;
  --print:#1B4F72;
  --line:rgba(27,79,114,.16);
  --line-strong:rgba(27,79,114,.34);
  --radius-organic:28px 10px 34px 14px;
  --radius-organic-alt:12px 32px 14px 40px;
  --font-body:system-ui,-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --shadow-1:0 1px 0 rgba(18,34,46,.05),0 10px 26px -20px rgba(18,34,46,.55);
  --shadow-2:0 2px 0 rgba(18,34,46,.06),0 22px 46px -24px rgba(18,34,46,.6);
  --shell-max:1320px;
}

/* ---------- base ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(120% 78% at 88% -8%,rgba(127,182,217,.34),rgba(127,182,217,0) 62%),
    radial-gradient(90% 60% at 4% 6%,rgba(217,227,232,.65),rgba(217,227,232,0) 58%),
    linear-gradient(180deg,rgba(217,227,232,.5),rgba(244,240,230,0) 42%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  min-height:100vh;
}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.02em;line-height:1.1}
p{text-wrap:pretty}
::selection{background:var(--neon);color:var(--ink)}

/* ---------- focus ---------- */
:focus-visible{outline:2px solid var(--sky);outline-offset:2px;border-radius:6px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--neon)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:12px;top:12px;z-index:120;
  transform:translateY(-180%);
  background:var(--neon);color:var(--ink);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  padding:10px 18px;border-radius:999px;
  box-shadow:0 10px 26px -12px rgba(18,34,46,.7);
  transition:transform .18s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

/* ============================================================
   HEADER — 电子屏状态条
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,#12222E 0%,#15303E 62%,#173646 100%);
  color:var(--paper);
  border-bottom:1px solid rgba(127,182,217,.28);
  box-shadow:0 18px 40px -34px rgba(9,20,28,.95);
}
.site-header::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(90deg,rgba(217,227,232,.06) 1px,transparent 1px),
    linear-gradient(180deg,rgba(217,227,232,.05) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.55;
}
.header-inner{
  position:relative;z-index:2;
  max-width:var(--shell-max);margin-inline:auto;
  padding:10px clamp(14px,3.4vw,32px);
  display:flex;align-items:center;gap:clamp(10px,1.8vw,22px);
  min-height:60px;
}

/* 品牌 */
.brand{
  order:1;flex:0 0 auto;
  display:inline-flex;align-items:center;gap:10px;
  padding:6px 4px;border-radius:10px;
  transition:transform .18s ease;
}
.brand:hover{transform:translateY(-2px)}
.brand__mark{
  font-size:clamp(16px,2vw,19px);font-weight:900;letter-spacing:-.02em;
  color:var(--paper);white-space:nowrap;
}
.brand__dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--neon);box-shadow:0 0 0 3px rgba(198,242,74,.24);
  flex:0 0 auto;
}
.brand__tagline{
  font-size:12px;letter-spacing:.06em;color:rgba(217,227,232,.7);
  border-left:1px solid rgba(217,227,232,.28);padding-left:10px;
  white-space:nowrap;
}

/* 移动端按钮 */
.nav-toggle{
  order:4;display:none;align-items:center;gap:8px;
  padding:8px 12px;border-radius:999px;
  border:1px solid rgba(127,182,217,.4);
  background:rgba(127,182,217,.1);
  color:var(--paper);font-size:12.5px;font-weight:600;letter-spacing:.08em;
  transition:transform .18s ease,background .18s ease;
}
.nav-toggle:hover{background:rgba(127,182,217,.2);transform:translateY(-1px)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars i{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .18s ease,opacity .18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 命令栏 */
.command-bar{
  order:2;margin-inline:auto;
  display:flex;align-items:center;gap:3px;
  padding:4px;border-radius:999px;
  background:rgba(244,240,230,.06);
  border:1px solid rgba(127,182,217,.22);
  max-width:100%;
}
.command-bar__link{
  display:inline-flex;align-items:center;justify-content:center;
  padding:7px 14px;border-radius:999px;
  font-size:13.5px;font-weight:500;letter-spacing:.01em;
  color:rgba(244,240,230,.78);
  border:1px solid transparent;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.command-bar__link:hover{
  color:var(--paper);
  background:rgba(127,182,217,.18);
  border-color:rgba(127,182,217,.45);
  transform:translateY(-1px);
}
.command-bar__link[aria-current="page"]{
  background:var(--neon);color:var(--ink);
  border-color:var(--neon);font-weight:700;
  box-shadow:0 8px 20px -12px rgba(198,242,74,.95);
}

/* 状态与 CTA */
.header-status{
  order:3;flex:0 0 auto;
  display:flex;align-items:center;gap:10px;
}
.status-chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  color:rgba(217,227,232,.88);
  background:rgba(217,227,232,.08);
  border:1px solid rgba(127,182,217,.26);
  white-space:nowrap;
}
.status-chip__light{
  width:7px;height:7px;border-radius:50%;
  background:var(--neon);box-shadow:0 0 0 3px rgba(198,242,74,.22);
}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(127,182,217,.16);overflow:hidden;
}
.scroll-progress > span{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cloud),var(--neon));
  transition:transform .12s linear;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,112px);
  background:linear-gradient(158deg,#12222E 0%,#0D1B24 58%,#123140 100%);
  color:rgba(244,240,230,.82);
  padding:clamp(40px,6vw,72px) 0 0;
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--neon),rgba(198,242,74,.1) 26%,var(--cloud) 52%,var(--sky) 78%,rgba(27,79,114,0) 100%);
}
.site-footer::after{
  content:"";position:absolute;right:-120px;top:-90px;width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle at 40% 40%,rgba(127,182,217,.22),rgba(127,182,217,0) 70%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:2;
  max-width:var(--shell-max);margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
  display:grid;
  grid-template-columns:minmax(200px,.9fr) minmax(0,2fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand__mark{
  font-size:20px;font-weight:900;letter-spacing:-.02em;color:var(--paper);
}
.footer-brand__mark::after{
  content:"";display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--neon);margin-left:8px;vertical-align:2px;
}
.footer-brand__note{
  font-size:13.5px;line-height:1.8;color:rgba(217,227,232,.68);max-width:28ch;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col__title{
  font-size:12px;font-weight:700;letter-spacing:.22em;
  color:var(--cloud);text-transform:uppercase;
}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-link{
  display:inline-block;
  font-size:14.5px;color:rgba(244,240,230,.82);
  padding:2px 0;border-bottom:1px solid transparent;
  transition:color .18s ease,transform .18s ease,border-color .18s ease;
}
.footer-link:hover{
  color:var(--neon);transform:translateY(-1px);
  border-bottom-color:rgba(198,242,74,.6);
}
.footer-base{
  position:relative;z-index:2;
  max-width:var(--shell-max);margin:clamp(28px,4vw,48px) auto 0;
  padding:18px clamp(16px,4vw,40px) 26px;
  border-top:1px solid rgba(127,182,217,.22);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:12.5px;line-height:1.7;color:rgba(217,227,232,.62);
}
.footer-contact{display:flex;flex-wrap:wrap;gap:6px 10px}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;
  margin-left:auto;
}
.footer-legal a{color:rgba(217,227,232,.8)}
.footer-lang{
  padding:2px 8px;border-radius:999px;
  border:1px solid rgba(127,182,217,.32);
  color:rgba(217,227,232,.78);letter-spacing:.08em;
}

/* 返回顶部 */
.to-top{
  position:fixed;right:16px;bottom:18px;z-index:70;
  padding:10px 16px;border-radius:999px;
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  background:var(--ink);color:var(--neon);
  border:1px solid rgba(198,242,74,.5);
  box-shadow:0 16px 34px -18px rgba(9,20,28,.9);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:#173344}

/* ============================================================
   通用布局
   ============================================================ */
.container{
  width:100%;max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  gap:12px 28px;margin-bottom:clamp(20px,3vw,34px);
}
.section__title{font-size:clamp(1.4rem,3vw,2.1rem)}
.section__note{
  font-size:13.5px;color:var(--bluegray);max-width:44ch;
  letter-spacing:.01em;
}
.rule{height:1px;background:var(--line);margin-block:clamp(24px,4vw,44px)}

.grid{display:grid;gap:clamp(16px,2vw,24px)}
.grid--split{grid-template-columns:1.1fr .9fr;align-items:start}
.grid--cards{grid-template-columns:repeat(auto-fill,minmax(255px,1fr))}

/* ============================================================
   排版组件
   ============================================================ */
.display-title{
  font-size:clamp(2.4rem,6.2vw,5.4rem);
  font-weight:900;line-height:1.02;letter-spacing:-.025em;
  color:var(--ink);
}
.lede{
  font-size:clamp(1.02rem,1.7vw,1.28rem);
  line-height:1.72;color:var(--ink-soft);
  max-width:52ch;
}
.eyebrow{
  display:inline-block;
  font-size:12px;font-weight:600;letter-spacing:.24em;
  color:var(--bluegray);text-transform:uppercase;
}
.annotation{
  writing-mode:vertical-rl;
  font-size:12px;letter-spacing:.22em;color:var(--print);
  font-weight:600;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:1.15em;letter-spacing:-.02em;
}

/* 章节抬头：编号 + 竖线 + 标题 */
.chapter{
  display:flex;align-items:center;gap:14px;
  margin-bottom:clamp(14px,2vw,20px);
}
.chapter::before{
  content:"";flex:0 0 auto;
  width:1px;height:40px;background:var(--print);opacity:.42;
}
.chapter__index{
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  letter-spacing:.18em;color:var(--print);
}
.chapter__title{
  font-size:clamp(1.25rem,2.6vw,1.85rem);
  font-weight:900;letter-spacing:-.015em;
}

/* ============================================================
   控件
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:999px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{
  background:var(--neon);color:var(--ink);
  box-shadow:0 12px 26px -16px rgba(198,242,74,.95);
}
.btn--primary:hover{background:#D5FA6B}
.btn--ghost{
  background:transparent;color:var(--print);
  border-color:var(--line-strong);
}
.btn--ghost:hover{background:rgba(127,182,217,.18);border-color:var(--sky);color:var(--ink)}
.header-cta{padding:8px 16px;font-size:13px}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(127,182,217,.22);color:var(--print);
  border:1px solid rgba(27,79,114,.18);
}
.tag--signal{
  background:rgba(194,65,12,.1);color:var(--orange);
  border-color:rgba(194,65,12,.32);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--neon);box-shadow:0 0 0 3px rgba(198,242,74,.28);
  flex:0 0 auto;
}

.filter-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:999px;
  font-size:13px;font-weight:600;
  color:var(--print);background:rgba(251,248,241,.85);
  border:1px solid var(--line-strong);
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.filter-chip:hover{transform:translateY(-2px);border-color:var(--sky)}
.filter-chip[aria-pressed="true"]{
  background:var(--ink);color:var(--neon);border-color:var(--ink);
}

/* 面包屑 */
.breadcrumbs{padding-block:clamp(14px,2vw,22px)}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-size:12.5px;letter-spacing:.04em;color:var(--bluegray);
}
.breadcrumbs__link{color:var(--print);border-bottom:1px solid rgba(27,79,114,.35)}
.breadcrumbs__link:hover{color:var(--sky);border-bottom-color:var(--sky)}
.breadcrumbs__sep{opacity:.5}
.breadcrumbs__current{color:var(--ink);font-weight:600}

/* ============================================================
   容器型组件
   ============================================================ */
.card{
  display:flex;flex-direction:column;gap:10px;
  padding:clamp(16px,2.2vw,24px);
  background:linear-gradient(170deg,var(--warm-white),#EFEAE0);
  border:1px solid var(--line);
  border-radius:var(--radius-organic);
  box-shadow:var(--shadow-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card--organic{border-radius:var(--radius-organic-alt)}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--line-strong)}
.card__title{font-size:1.12rem;font-weight:800;letter-spacing:-.01em}
.card__meta{
  font-size:12.5px;color:var(--bluegray);letter-spacing:.04em;
  display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;
}

.panel{
  padding:clamp(16px,2.2vw,24px);
  background:linear-gradient(200deg,rgba(251,248,241,.96),rgba(217,227,232,.72));
  border:1px solid var(--line);
  border-radius:var(--radius-organic-alt);
  box-shadow:var(--shadow-1);
}
.panel__title{
  font-size:12px;font-weight:700;letter-spacing:.22em;
  color:var(--print);text-transform:uppercase;margin-bottom:12px;
}

/* 图片容器基础规则 */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--radius-organic);
  background:linear-gradient(142deg,var(--cloud) 0%,var(--mist) 50%,var(--sky) 100%);
  border:1px solid rgba(27,79,114,.14);
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(18,34,46,.04) 0%,rgba(18,34,46,.12) 46%,rgba(18,34,46,.38) 100%);
}
.media-frame__img{
  width:100%;height:100%;
  aspect-ratio:16/10;object-fit:cover;
  filter:saturate(.94) contrast(1.02);
}
.media-frame--wide .media-frame__img{aspect-ratio:21/9}
.media-frame--portrait .media-frame__img{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;left:14px;bottom:12px;z-index:2;
  padding:4px 11px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  color:var(--paper);background:rgba(18,34,46,.6);
  backdrop-filter:blur(2px);
}

/* 长文 */
.prose{max-width:68ch}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:clamp(1.3rem,2.4vw,1.7rem);margin-top:1.8em}
.prose h3{font-size:1.12rem;margin-top:1.5em}
.prose p{color:var(--ink-soft)}
.prose a{color:var(--sky);border-bottom:1px solid rgba(46,110,150,.45);font-weight:600}
.prose a:hover{color:var(--ink);border-bottom-color:var(--ink)}
.prose ul{list-style:disc;padding-left:1.2em}
.prose li{margin-top:.4em;color:var(--ink-soft)}
.prose ul li::marker{color:var(--sky)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .brand__tagline{display:none}
}

@media (max-width:900px){
  html{scroll-padding-top:84px}
  .nav-toggle{display:inline-flex}
  .brand__dot{margin-left:auto}
  .header-status{margin-left:auto;order:3}
  .command-bar{
    order:5;
    position:absolute;left:clamp(12px,3.4vw,24px);right:clamp(12px,3.4vw,24px);
    top:calc(100% + 8px);
    margin-inline:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:10px;border-radius:22px;
    background:linear-gradient(180deg,#0E1E28,#132D3A);
    border:1px solid rgba(127,182,217,.32);
    box-shadow:0 26px 50px -24px rgba(9,20,28,.95);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    max-height:min(70vh,480px);overflow-y:auto;
    transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
  }
  .command-bar[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .command-bar__link{
    padding:11px 14px;border-radius:14px;justify-content:flex-start;
    font-size:14.5px;
  }
  .command-bar__link[aria-current="page"]{border-radius:14px}
  .footer-inner{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-legal{margin-left:0}
  .grid--split{grid-template-columns:1fr}
}

@media (max-width:640px){
  body{font-size:16px}
  .header-inner{min-height:56px;padding-block:8px}
  .status-chip{display:none}
  .header-cta{padding:7px 13px;font-size:12.5px}
  .nav-toggle__text{display:none}
  .nav-toggle{padding:9px 11px}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-contact{flex-direction:column;gap:2px}
  .to-top{right:12px;bottom:12px;padding:9px 13px}
  .chapter::before{height:32px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}