/* =====================================================================
   云体育入口 · 共享样式 /assets/site.css
   基调：高原竞技场 — 非对称编辑部版式 + 侧边轨道导航
   ===================================================================== */

/* ---------- 1. 重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; text-size-adjust:100%; }
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }
img,picture,svg,video{ display:block; max-width:100%; }
button,input,select,textarea{ font:inherit; color:inherit; }
button{ background:transparent; border:0; padding:0; cursor:pointer; }
a{ color:inherit; text-decoration:none; }
table{ border-collapse:collapse; width:100%; }
[hidden]{ display:none !important; }

/* ---------- 2. 设计令牌 ---------- */
:root{
  --sky:#0A84FF;
  --deep:#061B33;
  --snow:#F5F8FC;
  --mist:#E8F1FB;
  --rail:#0C2E4E;
  --red:#E63946;
  --yellow:#F2B705;
  --green:#2FA84F;
  --indigo:#0A6AD1;
  --rock:#7C8798;
  --line:#CBD8E6;

  --rail-w:220px;
  --maxw:1200px;
  --gutter:clamp(1rem,4vw,3.5rem);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"JetBrains Mono","IBM Plex Mono","Roboto Mono",ui-monospace,monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-hover:0 14px 28px -22px rgba(6,27,51,.55);
  --topbar-bg:rgba(245,248,252,.94);
}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--snow);
  color:var(--deep);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--deep);
}
h1{ font-size:clamp(2.6rem,6vw,5.4rem); line-height:1.02; letter-spacing:-.03em; }
h2{ font-size:clamp(1.6rem,3vw,2rem); line-height:1.25; }
h3{ font-size:1.375rem; font-weight:800; line-height:1.3; }
h4{ font-size:1.0625rem; font-weight:800; }
strong,b{ font-weight:800; }
::selection{ background:var(--sky); color:#fff; }

.num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.label{
  display:inline-block;
  font-family:var(--font-num);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--rock);
}

/* ---------- 4. 布局容器与网格 ---------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2.5vw,2rem);
}
.section{ margin-block:clamp(2.5rem,6vw,5.5rem); }
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:.75rem 1.5rem;
  padding-bottom:.9rem;
  border-bottom:1px solid var(--line);
  margin-bottom:1.75rem;
}
.section__kicker{
  display:block;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--sky);
  margin-bottom:.35rem;
}
.section__title{ font-size:clamp(1.6rem,3vw,2rem); }
.rule{ border:0; border-top:1px solid var(--line); margin:0; }
.rule--sky{ border-top:3px solid var(--sky); }

/* ---------- 5. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.7rem 1.2rem;
  font-family:var(--font-body);
  font-size:.9375rem;
  font-weight:700;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:2px;
  background:transparent;
  color:var(--deep);
  text-align:center;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--primary{ background:var(--sky); color:#fff; }
.btn--primary:hover{ background:var(--indigo); }
.btn--ghost{ border-color:var(--line); color:var(--deep); background:var(--snow); }
.btn--ghost:hover{ border-color:var(--sky); color:var(--indigo); background:var(--mist); }
.btn--sm{ padding:.45rem .85rem; font-size:.8125rem; }

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.15rem .55rem .15rem .7rem;
  font-size:.75rem;
  font-weight:700;
  line-height:1.6;
  color:var(--deep);
  background:var(--snow);
  border:1px solid var(--line);
  border-radius:2px;
  box-shadow:inset 3px 0 0 var(--tagc,var(--rock));
}
.tag--live{ --tagc:var(--red); }
.tag--soon{ --tagc:var(--sky); }
.tag--done{ --tagc:var(--green); }
.tag--data{ --tagc:var(--yellow); }

.card{
  position:relative;
  background:var(--snow);
  border:1px solid var(--line);
  border-radius:2px;
  padding:1.25rem 1.35rem 1.35rem;
  transition:border-color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  left:-1px;
  top:-1px;
  bottom:-1px;
  width:3px;
  background:var(--card-accent,var(--sky));
  transition:width .18s var(--ease);
}
.card:hover{
  border-color:var(--sky);
  background:#fff;
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.card:hover::before{ width:6px; }
.card--mist{ background:var(--mist); }
.card__title{ font-size:1.375rem; font-weight:800; line-height:1.3; letter-spacing:-.01em; }
.card__meta{
  font-family:var(--font-num);
  font-size:.8125rem;
  color:var(--rock);
  font-variant-numeric:tabular-nums;
}

.media{
  position:relative;
  overflow:hidden;
  background:var(--mist);
  border:1px solid var(--line);
  border-radius:2px;
}
.media > img,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.94) contrast(1.05);
}
.media--16x9{ aspect-ratio:16/9; }
.media--4x3{ aspect-ratio:4/3; }
.media--3x2{ aspect-ratio:3/2; }
.media--1x1{ aspect-ratio:1/1; }
.media--3x4{ aspect-ratio:3/4; }
.media[data-image]::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:34px 34px;
  opacity:.55;
}
.media--veil::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,27,51,0) 42%,rgba(6,27,51,.62) 100%);
  pointer-events:none;
}

.swatch{
  display:inline-block;
  width:12px;
  height:12px;
  flex:none;
  background:var(--rock);
  border:1px solid rgba(6,27,51,.28);
}
.swatch--blue{ background:var(--sky); }
.swatch--red{ background:var(--red); }
.swatch--green{ background:var(--green); }
.swatch--yellow{ background:var(--yellow); }
.swatch--white{ background:var(--snow); border-color:var(--line); }

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--rock);
  margin-bottom:1.5rem;
}
.breadcrumbs a{ color:var(--indigo); }
.breadcrumbs a:hover{ text-decoration:underline; text-underline-offset:3px; }
.breadcrumbs__sep{ color:var(--line); }
.breadcrumbs [aria-current="page"]{ color:var(--deep); }

.prose{ max-width:66ch; }
.prose p{ margin-bottom:1.2em; line-height:1.9; }
.prose p:last-child{ margin-bottom:0; }
.prose h2{ margin:2.2rem 0 .9rem; }
.prose h3{ margin:1.8rem 0 .7rem; }
.prose ul{ margin-bottom:1.2em; }
.prose ul li{ position:relative; padding-left:1.2rem; margin-bottom:.5em; }
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.75em;
  width:8px;
  height:2px;
  background:var(--sky);
}
.prose a{
  color:var(--indigo);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.prose a:hover{ background:rgba(10,132,255,.12); }
.prose blockquote{
  border-left:3px solid var(--sky);
  background:var(--mist);
  padding:.85rem 1.1rem;
  margin-bottom:1.2em;
}

/* ---------- 6. 头部 ---------- */
.site-header{ position:relative; z-index:80; }

.skip-link{
  position:absolute;
  left:1rem;
  top:-120px;
  z-index:200;
  padding:.6rem 1rem;
  background:var(--deep);
  color:var(--snow);
  font-size:.875rem;
  font-weight:700;
  border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{ top:.75rem; }

/* 侧边轨道导航 */
.rail-nav{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:min(84vw,320px);
  background:var(--rail);
  color:var(--snow);
  border-right:1px solid rgba(245,248,252,.14);
  overflow-y:auto;
  z-index:120;
  visibility:hidden;
  transform:translateX(-100%);
  transition:transform .24s var(--ease),visibility .24s var(--ease);
}
.rail-nav[data-open="true"]{ transform:translateX(0); visibility:visible; }

.rail-nav__inner{
  display:flex;
  flex-direction:column;
  min-height:100%;
  padding:1.5rem 0 1.75rem;
}
.rail-nav__label{
  padding:0 1.25rem;
  font-family:var(--font-num);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(245,248,252,.5);
}
.rail-nav__list{ margin-top:.85rem; }
.rail-link{
  position:relative;
  display:block;
  padding:.62rem 1.25rem;
  font-family:var(--font-display);
  font-size:.9375rem;
  font-weight:800;
  letter-spacing:-.01em;
  color:rgba(245,248,252,.78);
  border-left:3px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),padding-left .18s var(--ease);
}
.rail-link::before{
  content:attr(data-index);
  font-family:var(--font-num);
  font-size:.6875rem;
  font-weight:400;
  letter-spacing:.06em;
  color:rgba(245,248,252,.4);
  margin-right:.6rem;
}
.rail-link:hover{
  background:rgba(10,132,255,.18);
  color:#fff;
  border-left-color:var(--sky);
  padding-left:1.45rem;
}
.rail-link[aria-current="page"]{
  background:rgba(10,132,255,.26);
  color:#fff;
  border-left-color:var(--sky);
}
.rail-link[aria-current="page"]::before{ color:var(--yellow); }

.rail-cta{ display:none; margin:1.25rem 1.25rem 0; }

.rail-legend{
  margin-top:1.75rem;
  padding:1.5rem 1.25rem 0;
  border-top:1px solid rgba(245,248,252,.14);
}
.rail-legend__list{
  margin-top:.8rem;
  display:grid;
  gap:.45rem;
}
.rail-legend__list li{
  display:flex;
  align-items:center;
  gap:.55rem;
  font-size:.8125rem;
  color:rgba(245,248,252,.72);
}
.rail-foot{
  margin-top:auto;
  padding:1.25rem 1.25rem 0;
  border-top:1px solid rgba(245,248,252,.14);
}
.rail-foot__coords{
  font-family:var(--font-num);
  font-size:.6875rem;
  line-height:1.9;
  letter-spacing:.04em;
  color:rgba(245,248,252,.45);
}

/* 顶部焦点带 */
.topbar{
  position:sticky;
  top:0;
  z-index:90;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:.5rem 1.5rem;
  padding:.7rem var(--gutter);
  background:var(--topbar-bg);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.topbar::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:3px;
  transform-origin:0 50%;
  background:linear-gradient(90deg,
    var(--sky) 0 22%,
    var(--snow) 22% 42%,
    var(--red) 42% 62%,
    var(--green) 62% 82%,
    var(--yellow) 82% 100%);
  box-shadow:0 1px 0 var(--line);
  animation:flag-in 1.2s var(--ease) both;
}
@keyframes flag-in{
  from{ transform:scaleX(0); opacity:.2; }
  to{ transform:scaleX(1); opacity:1; }
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  color:var(--deep);
}
.brand__flags{
  display:inline-flex;
  align-items:stretch;
  gap:2px;
  height:22px;
}
.brand__flags i{
  display:block;
  width:3px;
  background:var(--sky);
  transition:transform .18s var(--ease);
}
.brand__flags i:nth-child(1){ background:var(--sky); }
.brand__flags i:nth-child(2){ background:var(--snow); box-shadow:inset 0 0 0 1px var(--line); }
.brand__flags i:nth-child(3){ background:var(--red); }
.brand__flags i:nth-child(4){ background:var(--green); }
.brand__flags i:nth-child(5){ background:var(--yellow); }
.brand:hover .brand__flags i:nth-child(odd){ transform:translateY(-3px); }
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.125rem;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.brand__tagline{
  padding-left:.7rem;
  border-left:1px solid var(--line);
  font-size:.75rem;
  color:var(--rock);
  white-space:nowrap;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .7rem;
  border:1px solid var(--line);
  border-radius:2px;
  background:var(--snow);
  color:var(--deep);
  font-size:.8125rem;
  font-weight:700;
}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:3px;
  width:16px;
  height:14px;
}
.nav-toggle__bars i{
  display:block;
  height:2px;
  background:var(--deep);
  transition:transform .18s var(--ease),opacity .18s var(--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); }
.nav-toggle__text{ letter-spacing:.02em; }

.status-strip{
  display:flex;
  align-items:center;
  gap:.75rem;
  min-width:0;
}
.status-strip__label{
  flex:none;
  padding-right:.75rem;
  border-right:1px solid var(--line);
  font-family:var(--font-num);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--rock);
}
.status-strip__list{
  display:flex;
  gap:.5rem;
  min-width:0;
  overflow-x:auto;
  padding:.2rem 0;
  scroll-snap-type:x proximity;
  scrollbar-width:thin;
}
.status-chip{
  flex:none;
  scroll-snap-align:start;
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.3rem .65rem;
  background:var(--mist);
  border:1px solid var(--line);
  border-radius:2px;
  font-size:.8125rem;
  color:var(--deep);
  box-shadow:inset 3px 0 0 var(--chip,var(--sky));
  transition:box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.status-chip:hover{
  background:#fff;
  border-color:var(--sky);
  box-shadow:inset 6px 0 0 var(--chip,var(--sky));
}
.status-chip--live{ --chip:var(--red); }
.status-chip--soon{ --chip:var(--sky); }
.status-chip--done{ --chip:var(--green); }
.status-chip--data{ --chip:var(--yellow); }
.status-chip__league{ font-weight:700; white-space:nowrap; }
.status-chip__time{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  color:var(--deep);
}
.status-chip__state{
  font-size:.6875rem;
  font-weight:700;
  color:var(--rock);
  white-space:nowrap;
}

.topbar__tools{
  display:flex;
  align-items:center;
  gap:.6rem;
}
.density-switch{
  display:inline-flex;
  border:1px solid var(--line);
  border-radius:2px;
  overflow:hidden;
}
.density-switch__btn{
  padding:.4rem .65rem;
  font-size:.75rem;
  font-weight:700;
  color:var(--rock);
  background:var(--snow);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.density-switch__btn + .density-switch__btn{ border-left:1px solid var(--line); }
.density-switch__btn:hover{ background:var(--mist); color:var(--deep); }
.density-switch__btn.is-active{ background:var(--deep); color:var(--snow); }

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  width:100%;
  height:100%;
  background:var(--sky);
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* 移动端抽屉遮罩 */
body.nav-open{ overflow:hidden; }

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--deep);
  color:rgba(245,248,252,.78);
  margin-top:clamp(3rem,7vw,6rem);
}
.site-footer::before{
  content:"";
  display:block;
  height:4px;
  background:linear-gradient(90deg,
    var(--sky) 0 22%,
    var(--snow) 22% 42%,
    var(--red) 42% 62%,
    var(--green) 62% 82%,
    var(--yellow) 82% 100%);
}
.site-footer__main{ padding-block:clamp(2.25rem,5vw,3.5rem); }
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,2.2fr) minmax(0,1.3fr);
  gap:clamp(1.5rem,3.5vw,3rem);
  align-items:start;
}
.footer-brand__line{
  margin-top:1rem;
  font-family:var(--font-display);
  font-weight:800;
  font-size:.9375rem;
  line-height:1.7;
  letter-spacing:-.01em;
  color:var(--snow);
}
.footer-brand__meta{
  margin-top:.5rem;
  font-size:.8125rem;
  color:rgba(245,248,252,.6);
}
.footer-legend{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1rem;
  margin-top:1.25rem;
}
.footer-legend li{
  display:flex;
  align-items:center;
  gap:.4rem;
  font-size:.75rem;
  color:rgba(245,248,252,.65);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1.5rem 2rem;
}
.footer-col__title{
  margin-bottom:.9rem;
  font-family:var(--font-num);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--snow);
}
.footer-col ul{ display:grid; gap:.5rem; }
.footer-col a{
  font-size:.875rem;
  color:rgba(245,248,252,.72);
  transition:color .16s var(--ease);
}
.footer-col a:hover{
  color:#fff;
  text-decoration:underline;
  text-underline-offset:3px;
}
.footer-contact__list{ display:grid; gap:.7rem; }
.footer-contact li{
  font-size:.875rem;
  line-height:1.8;
  color:rgba(245,248,252,.75);
}
.footer-contact__key{
  display:block;
  font-family:var(--font-num);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:rgba(245,248,252,.45);
}
.site-footer__bottom{
  border-top:1px solid rgba(245,248,252,.14);
  padding-block:1.25rem 2rem;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem 1.5rem;
  font-family:var(--font-num);
  font-size:.75rem;
  color:rgba(245,248,252,.55);
}
.footer-note{
  flex-basis:100%;
  font-family:var(--font-body);
  font-size:.75rem;
  line-height:1.8;
  color:rgba(245,248,252,.55);
}

/* ---------- 8. 显现与端侧视图协议 ---------- */
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
html.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}
html[data-density="mobile"]{ --maxw:720px; }
html[data-density="mobile"] .grid-12{ grid-template-columns:repeat(6,minmax(0,1fr)); }

/* ---------- 9. 响应式 ---------- */
@media (min-width:1025px){
  body{ padding-left:var(--rail-w); }
  .rail-nav{ width:var(--rail-w); transform:none; visibility:visible; }
}

@media (max-width:1024px){
  body.nav-open::before{
    content:"";
    position:fixed;
    inset:0;
    background:rgba(6,27,51,.55);
    z-index:110;
  }
  .nav-toggle{ display:inline-flex; }
  .rail-cta{ display:inline-flex; }
  .topbar{
    grid-template-columns:minmax(0,1fr) auto;
    gap:.5rem .75rem;
  }
  .status-strip{ grid-column:1 / -1; }
  .status-strip__label{ display:none; }
  .topbar__tools{ display:none; }
  .footer-grid{ grid-template-columns:minmax(0,1fr) minmax(0,1fr); }
  .footer-contact{ grid-column:1 / -1; }
}

@media (max-width:900px){
  .grid-12{ grid-template-columns:repeat(6,minmax(0,1fr)); }
  html[data-density="mobile"] .grid-12{ grid-template-columns:repeat(6,minmax(0,1fr)); }
}

@media (max-width:640px){
  body{ font-size:1rem; line-height:1.85; }
  .grid-12{ grid-template-columns:repeat(4,minmax(0,1fr)); }
  .footer-grid{ grid-template-columns:minmax(0,1fr); }
  .footer-contact{ grid-column:auto; }
  .footer-cols{ grid-template-columns:minmax(0,1fr) minmax(0,1fr); }
  .brand__tagline{ display:none; }
  .status-chip__state{ display:none; }
}

/* ---------- 10. 焦点与减弱动效 ---------- */
:focus-visible{
  outline:2px solid var(--yellow);
  outline-offset:2px;
}
.skip-link:focus-visible{ outline-offset:3px; }

@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-reveal [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .card:hover{ transform:none; }
  .rail-link:hover{ padding-left:1.25rem; }
}