/* =========================================================
   天空体育 SKY ARENA · 共享站点样式 /assets/site.css
   深夜转播间：深空蓝黑底 + 电光青脉冲 + 琥珀金数据
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#070B14;
  --midnight:#0E1830;
  --board:#142A4A;
  --pitch:#1F7A4D;
  --cyan:#35E0D0;
  --amber:#F2B544;
  --white:#E8F1FF;
  --mist:#8FA3BF;
  --alert:#FF5A6E;

  --line:rgba(232,241,255,.12);
  --line-soft:rgba(232,241,255,.07);
  --line-cyan:rgba(53,224,208,.28);
  --line-amber:rgba(242,181,68,.35);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shell:min(calc(100% - 40px),1440px);
  --header-h:76px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset 与中文排版基线 ---------- */
*,
*::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;
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
img,svg,video{display:block;max-width:100%}
a{color:var(--cyan);text-decoration:none}
a:hover{color:#6BF0E4}
button{font:inherit;color:inherit}
strong,b{font-weight:700}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:1px;
}

.numeric{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.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;
  border:0;
}

/* ---------- 3. 跳转链 ---------- */
.skip-link{
  position:fixed;
  top:12px;left:12px;
  z-index:300;
  display:inline-block;
  padding:11px 20px;
  background:var(--cyan);
  color:#04120F;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);color:#04120F}

/* ---------- 4. 头部：转播信号带 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:200;
  color:var(--white);
  background:linear-gradient(to bottom,rgba(7,11,20,.88) 0%,rgba(7,11,20,.55) 58%,rgba(7,11,20,0) 100%);
  border-bottom:1px solid transparent;
  transition:background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}

.site-header.is-stuck{
  background:rgba(7,11,20,.94);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line-cyan);
  box-shadow:0 22px 46px -34px rgba(0,0,0,.95);
}

.site-header__inner{
  width:var(--shell);
  min-height:var(--header-h);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,40px);
}

.site-header__edge{
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(53,224,208,.25) 70%,rgba(53,224,208,0) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* 品牌 */
.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--white);
  text-decoration:none;
}
.brand:hover{color:var(--white)}

.brand__mark{
  position:relative;
  width:32px;height:32px;
  display:grid;
  place-items:center;
  border:1px solid rgba(53,224,208,.55);
  border-radius:var(--radius);
  background:rgba(53,224,208,.06);
}
.brand__mark::before{
  content:"";
  width:9px;height:11px;
  background:var(--cyan);
  clip-path:polygon(0 0,100% 50%,0 100%);
}
.brand__pulse{
  position:absolute;
  inset:-1px;
  border-radius:var(--radius);
  animation:pulse-glow 3.4s ease-in-out infinite;
}
@keyframes pulse-glow{
  0%,100%{box-shadow:0 0 0 0 rgba(53,224,208,.28)}
  50%{box-shadow:0 0 0 7px rgba(53,224,208,0)}
}

.brand__text{display:flex;flex-direction:column;line-height:1.05}
.brand__name{
  font-size:17px;
  font-weight:900;
  letter-spacing:.05em;
  font-stretch:condensed;
}
.brand__latin{
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.32em;
  color:var(--mist);
}

/* 主导航 */
.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,28px);
  margin-inline-start:auto;
}

.primary-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(4px,1.4vw,22px);
}

.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:10px 2px 12px;
  color:var(--white);
  text-decoration:none;
  font-size:15px;
  font-weight:500;
  transition:color .18s var(--ease);
}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.2em;
  color:var(--mist);
  opacity:.7;
  transition:color .18s var(--ease),opacity .18s var(--ease);
}
.nav-link__label{display:block;white-space:nowrap}

.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:4px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s var(--ease),background-color .22s var(--ease);
}
.nav-link:hover{color:var(--cyan)}
.nav-link:hover .nav-link__idx{color:var(--cyan);opacity:1}
.nav-link:hover::after{transform:scaleX(1)}

.nav-link[aria-current="page"]{color:var(--cyan);font-weight:700}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--amber);opacity:1}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--amber);
}

.primary-nav__cta{display:none}

/* 头部右侧 */
.header-actions{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:10px;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 24px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:700;
  line-height:1;
  letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--solid{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04120F;
}
.btn--solid:hover{
  background:#6BF0E4;
  border-color:#6BF0E4;
  color:#04120F;
  transform:translateY(-1px);
}
.btn--ghost{
  background:transparent;
  border-color:rgba(232,241,255,.26);
  color:var(--white);
}
.btn--ghost:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-1px);
}
.btn--sm{padding:10px 16px;font-size:13px;letter-spacing:.05em}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 14px;
  background:transparent;
  border:1px solid rgba(232,241,255,.26);
  border-radius:var(--radius);
  color:var(--white);
  font-size:13px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  display:grid;
  gap:5px;
  width:16px;
}
.nav-toggle__bars i{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- 5. 桌面端纵向刻度轨（装饰） ---------- */
.site-rail{
  display:none;
  position:fixed;
  left:0;
  top:50%;
  transform:translateY(-50%);
  z-index:150;
  width:54px;
  flex-direction:column;
  align-items:center;
  gap:14px;
  pointer-events:none;
}
.site-rail__line{
  width:1px;
  height:74px;
  background:linear-gradient(to bottom,transparent,var(--line-cyan),transparent);
}
.site-rail__line--short{
  height:32px;
  background:linear-gradient(to bottom,rgba(242,181,68,.45),transparent);
}
.site-rail__label{
  writing-mode:vertical-rl;
  white-space:nowrap;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.42em;
  color:var(--mist);
  opacity:.72;
}

/* ---------- 6. 移动快捷坞 ---------- */
.quick-dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:180;
  display:none;
  background:rgba(7,11,20,.96);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-top:1px solid var(--line-cyan);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
.quick-dock__list{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.quick-dock__item{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  padding:11px 4px 13px;
  color:var(--mist);
  text-decoration:none;
  font-size:11px;
  letter-spacing:.12em;
  transition:color .18s var(--ease);
}
.quick-dock__item:hover,
.quick-dock__item:focus-visible{color:var(--cyan)}

.quick-dock__icon{
  position:relative;
  display:block;
  width:18px;height:18px;
  border:1px solid currentColor;
  border-radius:2px;
}
.quick-dock__icon[data-icon="schedule"]::before,
.quick-dock__icon[data-icon="schedule"]::after{
  content:"";
  position:absolute;
  left:4px;right:4px;
  height:1px;
  background:currentColor;
}
.quick-dock__icon[data-icon="schedule"]::before{top:5px}
.quick-dock__icon[data-icon="schedule"]::after{bottom:5px}

.quick-dock__icon[data-icon="tutorial"]::before{
  content:"";
  position:absolute;
  top:50%;left:50%;
  transform:translate(-40%,-50%);
  border-left:6px solid currentColor;
  border-top:4px solid transparent;
  border-bottom:4px solid transparent;
}

.quick-dock__icon[data-icon="news"]::before{
  content:"";
  position:absolute;
  inset:5px;
  border-radius:50%;
  background:currentColor;
}

.quick-dock__icon[data-icon="contact"]::before{
  content:"";
  position:absolute;
  top:3px;bottom:3px;left:50%;
  width:1px;
  background:currentColor;
  transform:rotate(30deg);
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--midnight);
  color:var(--white);
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--pitch) 0%,var(--cyan) 34%,rgba(53,224,208,.05) 72%,transparent 100%);
}
.site-footer__inner{
  width:var(--shell);
  margin-inline:auto;
  padding:clamp(44px,6vw,76px) 0 26px;
}

.footer-masthead{
  display:flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:16px clamp(16px,3vw,32px);
  padding-bottom:clamp(22px,3vw,34px);
  margin-bottom:clamp(28px,4vw,48px);
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:inline-flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:8px 16px;
  color:var(--white);
  text-decoration:none;
}
.footer-brand:hover{color:var(--white)}
.footer-brand__name{
  font-size:clamp(24px,3.6vw,42px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.03em;
}
.footer-brand__latin{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.42em;
  color:var(--cyan);
}
.footer-brand__line{
  flex:1 1 60px;
  min-width:32px;
  height:1px;
  background:rgba(232,241,255,.18);
}
.footer-brand__sub{
  font-size:13px;
  letter-spacing:.3em;
  color:var(--mist);
  white-space:nowrap;
}

.footer-grid{
  display:grid;
  grid-template-columns:1fr 1fr 1fr 1.5fr;
  gap:clamp(24px,4vw,56px);
}
.footer-col{min-width:0}
.footer-col--contact{grid-column:auto}
.footer-col__heading{
  margin-bottom:16px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.26em;
  color:var(--mist);
  text-transform:uppercase;
}
.footer-col__list{display:grid;gap:11px}

.footer-link{
  display:inline-block;
  color:var(--white);
  font-size:15px;
  line-height:1.7;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{
  color:var(--cyan);
  border-bottom-color:rgba(53,224,208,.5);
}

.footer-contact__row{
  display:grid;
  grid-template-columns:40px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  font-size:14px;
  line-height:1.7;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--mist);
}
.footer-contact__val{
  color:var(--white);
  overflow-wrap:anywhere;
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(32px,5vw,56px);
  padding-top:20px;
  border-top:1px solid var(--line);
}
.footer-legal{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}

/* ---------- 8. 通用布局与内容组件 ---------- */
.container{
  width:var(--shell);
  margin-inline:auto;
}
.container--narrow{
  width:min(calc(100% - 40px),860px);
  margin-inline:auto;
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
}

.section-title{
  margin-top:14px;
  font-size:clamp(26px,3.6vw,44px);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.03em;
}
.section-lede{
  max-width:68ch;
  margin-top:16px;
  color:var(--mist);
  font-size:16px;
  line-height:1.95;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 11px;
  border:1px solid rgba(232,241,255,.2);
  border-radius:1px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
  line-height:1.5;
}
.tag--live{
  border-color:rgba(53,224,208,.5);
  color:var(--cyan);
}
.tag--live::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,224,208,.16);
}
.tag--score{
  border-color:var(--line-amber);
  color:var(--amber);
}

/* 面包屑 */
.breadcrumb{margin-block:clamp(20px,3vw,34px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{
  color:var(--mist);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:rgba(143,163,191,.45)}
.breadcrumb__current{color:var(--white)}

/* 图片容器基础（页面阶段放 <img> 或 <picture>） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--midnight);
  border:1px solid var(--line);
  isolation:isolate;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(53,224,208,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(53,224,208,.08) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:linear-gradient(to top,rgba(0,0,0,.85),transparent 62%);
  mask-image:linear-gradient(to top,rgba(0,0,0,.85),transparent 62%);
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--cinema{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:1;
  padding:14px 16px;
  background:linear-gradient(to top,rgba(7,11,20,.92),rgba(7,11,20,0));
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ---------- 9. 滚动显现协议 ---------- */
html.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js-ready [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 10. 响应式 ---------- */
@media (min-width:1600px){
  .site-rail{display:flex}
}

@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}

  .primary-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    margin:0;
    padding:10px 20px 34px;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:rgba(7,11,20,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line-cyan);
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-header[data-open="true"] .primary-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .site-header[data-open="true"]{
    background:rgba(7,11,20,.97);
    border-bottom-color:var(--line-cyan);
  }

  .primary-nav__list{
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-link{
    flex-direction:row;
    align-items:baseline;
    gap:16px;
    padding:16px 2px;
    font-size:17px;
    border-bottom:1px solid var(--line);
  }
  .nav-link::after{display:none}
  .nav-link__idx{font-size:10px}

  .primary-nav__cta{
    display:grid;
    gap:10px;
    margin-top:24px;
  }
  .primary-nav__cta .btn{width:100%}
}

@media (max-width:900px){
  .quick-dock{display:block}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}

  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col--contact{grid-column:1 / -1}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

@media (max-width:640px){
  :root{--header-h:68px}
  .brand__latin{display:none}
  .brand__name{font-size:16px}
  .nav-toggle__text{display:none}
  .nav-toggle{padding:11px}

  .footer-masthead{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-brand__line{display:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-col--contact{grid-column:auto}
  .footer-base{flex-direction:column;align-items:flex-start}

  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.js-ready [data-reveal]{
    opacity:1;
    transform:none;
  }
  .brand__pulse{animation:none}
}