/* =========================================================
   云体育主站 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 框架头部 / 页脚 / 基础组件
   ========================================================= */

:root{
  --ink:#050A14;
  --deep:#0B1B33;
  --slate:#13294B;
  --paper:#F4F7F5;
  --muted:#A8B3C2;
  --cyan:#2FF3D0;
  --orange:#FF6A2A;
  --line:#26364D;
  --green:#36D399;
  --warn:#FFD166;
  --ink-soft:#48565F;
  --cyan-deep:#0A6C5E;

  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --w-max:1240px;
  --gutter:clamp(16px,4vw,48px);
  --header-h:78px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 20px);
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  color:var(--paper);
  background:
    radial-gradient(1200px 560px at 8% -14%, rgba(47,243,208,.10), transparent 58%),
    radial-gradient(920px 520px at 94% -6%, rgba(19,41,75,.95), transparent 62%),
    var(--ink);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.15;
  color:inherit;
}
h1{font-size:clamp(40px,7vw,88px);line-height:1.05;font-weight:900}
h2{font-size:clamp(28px,4vw,48px);font-weight:800;line-height:1.18}
h3{font-size:clamp(22px,2.6vw,28px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
h4{font-size:18px;font-weight:800;letter-spacing:0;line-height:1.4}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:clamp(20px,3vw,32px) 0}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:var(--radius);
}
::selection{background:var(--cyan);color:var(--ink)}

/* ---------- 工具类 ---------- */
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.accent{color:var(--cyan)}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:12px;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink);
  font-size:14px;
  font-weight:800;
  letter-spacing:.06em;
  border-radius:var(--radius);
  transform:translateY(-240%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* =========================================================
   框架式头部
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,#050A14 0%,#0B1B33 100%);
  border-bottom:1px solid var(--line);
  box-shadow:0 14px 34px rgba(5,10,20,.55);
  isolation:isolate;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:repeating-linear-gradient(
    90deg,
    transparent 0 63px,
    rgba(47,243,208,.13) 63px 64px
  );
  opacity:.75;
}

.header-inner{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  width:100%;
  max-width:var(--w-max);
  min-height:var(--header-h);
  margin-inline:auto;
  padding:10px var(--gutter);
}

/* 品牌 */
.brand{
  order:1;
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:4px 0;
  flex:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:none;
  background:var(--cyan);
  color:var(--ink);
  font-size:19px;
  font-weight:900;
  line-height:1;
  border-radius:var(--radius);
  box-shadow:0 0 0 1px rgba(47,243,208,.35),0 0 22px rgba(47,243,208,.30);
}
.brand-text{display:flex;flex-direction:column;line-height:1.22}
.brand-name{font-size:17px;font-weight:900;letter-spacing:.02em;color:var(--paper)}
.brand-line{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--cyan)}

/* 移动导航按钮 */
.nav-toggle{
  order:2;
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  background:rgba(19,41,75,.9);
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--paper);
  font-size:13px;
  font-weight:800;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:3px;width:16px}
.nav-toggle-bars span{
  display:block;
  height:2px;
  background:var(--cyan);
  border-radius:1px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* 导航 */
.frame-nav{
  order:2;
  flex:1 1 auto;
  display:flex;
  justify-content:center;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.3vw,18px);
  counter-reset:nav;
}
.nav-item{
  display:flex;
  align-items:baseline;
  gap:6px;
  counter-increment:nav;
  min-width:0;
}
.nav-item::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-num);
  font-size:10px;
  line-height:1;
  letter-spacing:.05em;
  color:var(--muted);
  opacity:.85;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:15px 2px 13px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--paper);
  white-space:nowrap;
  transition:color .16s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:7px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--cyan)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* 快捷入口 */
.header-actions{
  order:3;
  display:flex;
  align-items:center;
  gap:8px;
  flex:none;
}
.action-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 12px;
  background:rgba(11,27,51,.72);
  border:1px solid var(--line);
  border-radius:var(--radius);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--paper);
  white-space:nowrap;
  transition:border-color .16s var(--ease),color .16s var(--ease),
             transform .16s var(--ease),box-shadow .16s var(--ease);
}
.action-link:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-1px);
  box-shadow:0 8px 16px rgba(5,10,20,.55);
}
.action-link--primary{
  background:var(--orange);
  border-color:var(--orange);
  color:#140703;
}
.action-link--primary:hover{
  background:#FF8351;
  border-color:#FF8351;
  color:#140703;
}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  z-index:5;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(47,243,208,.12));
  transform:scaleX(0);
  transform-origin:left center;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,#0B1B33 0%,#050A14 100%);
  border-top:1px solid var(--line);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:1px;
  background:repeating-linear-gradient(90deg,var(--cyan) 0 22px,transparent 22px 46px);
  opacity:.4;
}
.footer-inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:clamp(36px,6vw,64px) var(--gutter) clamp(20px,3vw,28px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(20px,4vw,48px);
}
.footer-col{min-width:0}

.footer-kicker{
  margin-bottom:12px;
  font-family:var(--font-num);
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan);
}
.footer-brandname{
  margin-bottom:12px;
  font-size:clamp(24px,3vw,32px);
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.2;
}
.footer-summary{
  max-width:34ch;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}

.footer-col-title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-size:12px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--paper);
}
.footer-links{display:grid;gap:9px}
.footer-links a{
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.footer-links a:hover{color:var(--cyan);padding-left:4px}

.footer-contact-list{display:grid;gap:10px}
.footer-contact-list li{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.footer-label{
  font-size:11px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--cyan);
}
.footer-value{
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  overflow-wrap:anywhere;
}
.footer-value--num{font-family:var(--font-num)}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:clamp(28px,5vw,44px);
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-copy{
  margin:0;
  font-family:var(--font-num);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer-legal a{
  font-size:13px;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-legal a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-note{
  width:100%;
  margin:0;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
  opacity:.85;
}

/* =========================================================
   页面容器与网格
   ========================================================= */
.container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(32px,6vw,72px)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--12 > *{grid-column:span 12;min-width:0}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* =========================================================
   画板 / 展签 / 数字 / 标签
   ========================================================= */
.panel{
  position:relative;
  padding:clamp(20px,3.4vw,40px);
  background:var(--deep);
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--paper);
  box-shadow:0 18px 38px rgba(5,10,20,.32);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink);
  border-color:#C3CFC9;
  box-shadow:0 16px 0 -10px rgba(38,54,77,.32),0 26px 46px rgba(5,10,20,.30);
}
.panel--slate{
  background:var(--slate);
  border-color:#20395C;
}

.panel-index{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--cyan);
}
.panel-index::before{
  content:"";
  width:16px;
  height:2px;
  background:currentColor;
}
.panel--paper .panel-index{color:var(--cyan-deep)}

.panel-title{
  margin-bottom:12px;
  font-size:clamp(22px,2.6vw,30px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.01em;
}
.panel-lede{
  max-width:62ch;
  font-size:16px;
  line-height:1.8;
  color:var(--muted);
}
.panel--paper .panel-lede{color:var(--ink-soft)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  background:rgba(47,243,208,.08);
  border:1px solid rgba(47,243,208,.42);
  border-radius:var(--radius);
  font-size:12px;
  font-weight:800;
  letter-spacing:.12em;
  line-height:1.6;
  color:var(--cyan);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease);
}
.tag:hover{transform:translateY(-1px);box-shadow:0 6px 14px rgba(5,10,20,.45)}
.tag--accent{
  color:var(--orange);
  border-color:rgba(255,106,42,.5);
  background:rgba(255,106,42,.10);
}
.tag--warn{
  color:var(--warn);
  border-color:rgba(255,209,102,.45);
  background:rgba(255,209,102,.10);
}
.tag--ok{
  color:var(--green);
  border-color:rgba(54,211,153,.45);
  background:rgba(54,211,153,.10);
}

.stat{display:grid;gap:4px}
.stat-value{
  font-family:var(--font-num);
  font-size:clamp(28px,4vw,44px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.stat-label{
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--muted);
}

/* =========================================================
   按钮
   ========================================================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:800;
  letter-spacing:.05em;
  line-height:1.3;
  text-align:center;
  cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  background:var(--cyan);
  color:var(--ink);
  box-shadow:0 10px 22px rgba(47,243,208,.22);
}
.btn--primary:hover{background:#5EF7DE;color:var(--ink)}
.btn--accent{
  background:var(--orange);
  color:#140703;
  box-shadow:0 10px 22px rgba(255,106,42,.24);
}
.btn--accent:hover{background:#FF8351;color:#140703}
.btn--ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--paper);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:9px 14px;font-size:13px;letter-spacing:.04em}
.btn__mark{font-family:var(--font-num);font-size:12px;opacity:.72}

/* =========================================================
   面包屑
   ========================================================= */
.breadcrumb{padding-block:14px}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--muted);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{
  content:"›";
  font-size:14px;
  line-height:1;
  color:var(--line);
}
.breadcrumb-link{color:var(--muted);transition:color .16s var(--ease)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--cyan);font-weight:800}

/* =========================================================
   图片容器（供页面阶段放置图片占位）
   ========================================================= */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(47,243,208,.16),transparent 46%),
    linear-gradient(315deg,rgba(255,106,42,.14),transparent 42%),
    repeating-linear-gradient(90deg,transparent 0 47px,rgba(38,54,77,.6) 47px 48px),
    var(--slate);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:6px;
  border:1px solid rgba(244,247,245,.16);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-caption{
  margin-top:8px;
  font-size:12.5px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--muted);
}

/* =========================================================
   进场显现（无 JS 时保持可见）
   ========================================================= */
.reveal{opacity:1;transform:none}
.reveal-ready .reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.reveal-ready .reveal.is-visible{opacity:1;transform:none}

/* =========================================================
   返回顶部（由 JS 注入）
   ========================================================= */
.to-top{
  --progress:0;
  position:fixed;
  right:clamp(12px,2.6vw,28px);
  bottom:clamp(12px,2.6vw,28px);
  z-index:70;
  display:grid;
  place-items:center;
  width:54px;
  height:54px;
  border-radius:50%;
  background:rgba(11,27,51,.94);
  border:1px solid var(--line);
  color:var(--cyan);
  font-family:var(--font-num);
  font-size:17px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  backdrop-filter:blur(6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             visibility .2s linear,border-color .16s var(--ease),
             box-shadow .16s var(--ease);
}
.to-top::before{
  content:"";
  position:absolute;
  inset:-4px;
  border-radius:50%;
  background:conic-gradient(var(--cyan) calc(var(--progress) * 1%),rgba(47,243,208,.14) 0);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  pointer-events:none;
}
.to-top.is-active{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan);box-shadow:0 10px 24px rgba(5,10,20,.6)}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1100px){
  .header-actions .action-link{font-size:12px;padding:7px 10px}
  .nav-link{font-size:14px;padding-block:14px 12px}
}

@media (max-width:960px){
  :root{--header-h:64px}

  .header-inner{padding-block:10px;gap:8px 14px}

  .nav-toggle{display:inline-flex}

  .frame-nav{
    order:3;
    display:none;
    flex:1 1 100%;
    width:100%;
    justify-content:flex-start;
    margin-top:2px;
    padding:6px 0 14px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg,#0B1B33,#08152A);
  }
  .frame-nav[data-open]{display:block}

  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{
    display:block;
    border-bottom:1px solid rgba(38,54,77,.65);
  }
  .nav-item::before{display:none}
  .nav-link{
    display:block;
    width:100%;
    padding:13px 2px;
    font-size:16px;
    letter-spacing:.08em;
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{
    color:var(--cyan);
    box-shadow:inset 3px 0 0 0 var(--cyan);
    padding-left:12px;
  }

  .header-actions{
    order:4;
    flex:1 1 100%;
    flex-wrap:wrap;
    gap:8px;
    padding-top:6px;
  }
  .header-actions .action-link{font-size:12px;padding:8px 12px}

  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}

  .grid--12 > .span-3,
  .grid--12 > .span-4,
  .grid--12 > .span-5,
  .grid--12 > .span-6,
  .grid--12 > .span-7,
  .grid--12 > .span-8,
  .grid--12 > .span-9{grid-column:span 6}
}

@media (max-width:640px){
  .brand-mark{width:32px;height:32px;font-size:16px}
  .brand-name{font-size:15px}
  .brand-line{display:none}
  .nav-toggle{font-size:12px;letter-spacing:.1em;padding:8px 10px}

  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-summary{max-width:none}
  .footer-bottom{gap:10px}

  .grid--12 > [class*="span-"]{grid-column:span 12}

  .panel{padding:18px 16px}
  .btn{width:100%}
  .to-top{width:46px;height:46px;font-size:15px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal,.reveal-ready .reveal{
    opacity:1 !important;
    transform:none !important;
  }
  .btn:hover,.action-link:hover,.tag:hover{transform:none}
  .to-top{transition:opacity .01ms linear}
}