/* ============================================================
   体验体育 · 夜赛数据舱  /assets/site.css
   共享样式表：reset / 变量 / 排版 / 页头 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --deep:#0B1020;
  --deck:#111A33;
  --steel:#1E2A47;
  --mist:#8FA3C8;
  --ice:#EAF0FF;
  --orange:#FF6B1A;
  --amber:#FFB020;
  --turf:#3DDC97;
  --signal:#FF3B3B;
  --violet:#7C5CFF;

  --line:rgba(143,163,200,.18);
  --line-strong:rgba(143,163,200,.34);
  --veil:rgba(11,16,32,.86);

  --r-lg:32px;
  --r-md:24px;
  --r-sm:20px;
  --pill:999px;

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Cascadia Mono",Consolas,"Liberation Mono",Menlo,monospace;

  --wrap:1280px;
  --gut:clamp(18px,4vw,40px);
  --bar-h:70px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100%;
  background-color:var(--deep);
  background-image:
    linear-gradient(rgba(143,163,200,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,163,200,.055) 1px,transparent 1px),
    radial-gradient(1080px 640px at 88% -10%,rgba(255,107,26,.13),transparent 62%),
    radial-gradient(860px 540px at -8% 6%,rgba(124,92,255,.11),transparent 60%),
    radial-gradient(900px 700px at 50% 118%,rgba(61,220,151,.07),transparent 62%);
  background-size:120px 120px,120px 120px,auto,auto,auto;
  background-attachment:fixed,fixed,fixed,fixed,fixed;
  color:var(--ice);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit}
button{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p{margin:0}
table{border-collapse:collapse;width:100%}
[id="main-content"]{scroll-margin-top:150px}

/* ---------- 3. 焦点 & 无障碍 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:6px;
}
.skip-link{
  position:fixed;
  top:14px;
  left:14px;
  z-index:300;
  padding:11px 20px;
  border-radius:var(--pill);
  background:var(--orange);
  color:#0B1020;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-240%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 4. 布局工具 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.section{padding-block:clamp(38px,5.5vw,76px)}
.section--tight{padding-block:clamp(24px,3.4vw,48px)}
.stack{display:grid;gap:clamp(14px,2vw,24px)}
.grid{display:grid;gap:clamp(16px,2.2vw,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))}
.rule{height:1px;border:0;margin:0;background:var(--line)}
.mono{font-family:var(--font-mono);letter-spacing:.06em;font-weight:600}
.muted{color:var(--mist)}
.accent{color:var(--orange)}

/* ---------- 5. 排版组件 ---------- */
.page-head{padding-block:clamp(34px,6vw,72px) clamp(20px,3.6vw,44px)}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:14px;
}
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,96px);
  line-height:1.02;
  letter-spacing:-.02em;
  color:var(--ice);
}
.display--sm{font-size:clamp(30px,4.4vw,56px);line-height:1.08}
.lede{
  max-width:62ch;
  margin-top:18px;
  font-size:clamp(16px,1.35vw,18px);
  line-height:1.85;
  color:var(--mist);
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(20px,3vw,34px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  margin-right:8px;
  color:rgba(143,163,200,.5);
}
.breadcrumb__item a{color:var(--mist);text-decoration:none}
.breadcrumb__item a:hover{color:var(--ice)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:700;
  line-height:1;
  white-space:nowrap;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn--signal{
  background:var(--orange);
  color:#0B1020;
  box-shadow:0 8px 22px rgba(255,107,26,.26);
}
.btn--signal:hover{
  background:#ff8340;
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(255,107,26,.36);
}
.btn--outline{
  background:rgba(143,163,200,.06);
  border-color:var(--line-strong);
  color:var(--ice);
}
.btn--outline:hover{
  border-color:var(--orange);
  color:var(--orange);
  transform:translateY(-2px);
}
.btn--ghost{background:transparent;color:var(--mist)}
.btn--ghost:hover{background:rgba(143,163,200,.12);color:var(--ice)}
.btn--sm{padding:8px 15px;font-size:13px}

/* ---------- 8. 状态标签 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 12px;
  border:1px solid transparent;
  border-radius:var(--pill);
  background:rgba(143,163,200,.12);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.chip--live{color:var(--turf);background:rgba(61,220,151,.12);border-color:rgba(61,220,151,.32)}
.chip--hot{color:var(--amber);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.32)}
.chip--alert{color:var(--signal);background:rgba(255,59,59,.12);border-color:rgba(255,59,59,.32)}

/* ---------- 9. 卡片 ---------- */
.card{
  padding:clamp(20px,2.6vw,30px);
  background:var(--deck);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  transition:transform .2s ease,border-color .2s ease,background-color .2s ease;
}
.card:hover,.card:focus-within{
  transform:translateY(-4px);
  border-color:rgba(255,107,26,.55);
  background:#14203c;
}
.card__title{
  font-family:var(--font-display);
  font-size:clamp(20px,2vw,26px);
  font-weight:900;
  line-height:1.25;
  color:var(--ice);
}
.card__meta{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--mist);
}

/* ---------- 10. 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--deck);
}
.media__frame{
  display:block;
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  background-color:#0e1730;
  background-image:
    repeating-linear-gradient(135deg,rgba(143,163,200,.075) 0 2px,transparent 2px 14px),
    radial-gradient(120% 95% at 22% 0%,rgba(255,107,26,.20),transparent 62%),
    radial-gradient(90% 80% at 100% 100%,rgba(124,92,255,.16),transparent 60%);
}
.media__overlay{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,16,32,0) 34%,rgba(11,16,32,.88) 100%);
}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:16px 18px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.media--portrait .media__frame{aspect-ratio:3/4}
.media--square .media__frame{aspect-ratio:1/1}
.media--cinema .media__frame{aspect-ratio:21/9}

/* ---------- 11. 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  z-index:200;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--orange),var(--amber));
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* ---------- 12. 显现动效 ---------- */
[data-reveal]{transition:opacity .55s ease,transform .55s ease}
html.js [data-reveal]:not(.is-visible){opacity:0;transform:translateY(14px)}

/* ============================================================
   页头
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--veil);
  border-bottom:1px solid var(--line-strong);
  backdrop-filter:blur(16px) saturate(1.5);
  -webkit-backdrop-filter:blur(16px) saturate(1.5);
}
.header-rail{
  max-height:64px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(255,107,26,.12),rgba(124,92,255,.07) 55%,transparent);
  transition:max-height .28s ease,opacity .22s ease,border-color .22s ease;
}
.header-rail__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:46px;
  padding-block:6px;
}
.header-rail__note{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-size:13px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--mist);
}
.header-rail__dot{
  width:8px;height:8px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--turf);
  animation:pulse 2.6s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(61,220,151,.55)}
  70%{box-shadow:0 0 0 9px rgba(61,220,151,0)}
  100%{box-shadow:0 0 0 0 rgba(61,220,151,0)}
}
.header-rail__meta{color:rgba(143,163,200,.72);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}

.header-bar__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:var(--bar-h);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--ice);
  text-decoration:none;
}
.brand__mark{
  width:38px;height:38px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  border-radius:14px;
  background:linear-gradient(145deg,var(--orange),#ff9a3d);
  color:#0B1020;
  box-shadow:0 10px 24px rgba(255,107,26,.28);
}
.brand__mark svg{width:22px;height:22px}
.brand__text{display:block;line-height:1.1}
.brand__name{
  display:block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:.04em;
}
.brand__sub{
  display:block;
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--mist);
}
.brand--footer .brand__mark{width:34px;height:34px;border-radius:12px}
.brand--footer .brand__name{font-size:17px}

/* 导航 */
.nav{margin-left:auto}
.nav__list{display:flex;align-items:center;gap:3px}
.nav__item{display:block}
.nav__link{
  position:relative;
  display:inline-block;
  padding:9px 13px;
  border-radius:var(--pill);
  color:var(--mist);
  font-size:14.5px;
  font-weight:500;
  white-space:nowrap;
  text-decoration:none;
  transition:color .18s ease,background-color .18s ease,box-shadow .18s ease;
}
.nav__link:hover{color:var(--ice);background:rgba(143,163,200,.13)}
.nav__link[aria-current="page"]{
  color:var(--ice);
  background:rgba(255,107,26,.16);
  box-shadow:inset 0 0 0 1px rgba(255,107,26,.5);
}
.nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;bottom:3px;
  width:14px;height:2px;
  border-radius:2px;
  background:var(--orange);
  transform:translateX(-50%);
}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border:1px solid var(--line-strong);
  border-radius:var(--pill);
  background:rgba(143,163,200,.10);
  color:var(--ice);
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--orange);background:rgba(255,107,26,.14)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor}
.nav-toggle__bars span:last-child{width:11px}
.nav-toggle__label{letter-spacing:.06em}

/* 桌面端收起上层 */
@media (min-width:1121px){
  .site-header[data-condensed] .header-rail{
    max-height:0;
    opacity:0;
    border-color:transparent;
  }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-top:clamp(56px,8vw,112px);
  padding-block:clamp(40px,6vw,74px) 26px;
  border-top:1px solid var(--line-strong);
  background:linear-gradient(180deg,rgba(17,26,51,.72),rgba(11,16,32,1));
  color:var(--mist);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:clamp(24px,3.6vw,50px);
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand{display:grid;gap:16px;align-content:start}
.footer-claim{
  font-size:14px;
  line-height:1.8;
  color:var(--mist);
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:rgba(143,163,200,.78);
}
.footer-col{display:grid;gap:14px;align-content:start}
.footer-title{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--orange);
}
.footer-list{display:grid;gap:9px}
.footer-list a{
  display:inline-block;
  font-size:14.5px;
  color:var(--mist);
  text-decoration:none;
  transition:color .18s ease,transform .18s ease;
}
.footer-list a:hover{color:var(--ice);transform:translateX(3px)}
.footer-contact{display:grid;gap:11px;font-size:14.5px;line-height:1.7}
.footer-contact li{color:var(--ice);word-break:break-word}
.footer-label{
  display:inline-block;
  min-width:44px;
  margin-right:8px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.14em;
  color:rgba(143,163,200,.75);
}
.footer-hint{
  margin-top:12px;
  font-size:13px;
  line-height:1.75;
  color:rgba(143,163,200,.78);
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 22px;
  padding-top:22px;
}
.footer-base__note{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--amber);
}
.footer-base__actions{display:flex;flex-wrap:wrap;gap:10px}
.footer-base__copy{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(143,163,200,.72);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1120px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1060px){
  .nav-toggle{display:inline-flex}
  .nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin:0;
    display:none;
    padding:12px var(--gut) 22px;
    background:rgba(9,14,28,.985);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 26px 48px rgba(0,0,0,.5);
  }
  .nav[data-open]{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:3px}
  .nav__link{
    display:block;
    padding:13px 15px;
    border-radius:16px;
    font-size:16px;
  }
  .nav__link[aria-current="page"]::after{
    left:15px;
    bottom:50%;
    width:3px;
    height:16px;
    transform:translateY(50%);
  }
  .header-bar__inner{position:relative;flex-wrap:nowrap}
}

@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  body{background-attachment:scroll,scroll,scroll,scroll,scroll;background-size:88px 88px,88px 88px,auto,auto,auto}
}

@media (max-width:720px){
  .header-rail__meta{display:none}
  .header-rail__note{font-size:12.5px}
  .brand__sub{letter-spacing:.16em}
}

@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-base{flex-direction:column;align-items:flex-start}
  .header-rail__inner{padding-block:8px}
  .brand__name{font-size:17px}
  .brand__mark{width:34px;height:34px;border-radius:12px}
  .display{letter-spacing:-.01em}
  .media__caption{position:static;background:rgba(11,16,32,.7)}
}

@media (max-width:420px){
  .header-rail__note{font-size:12px}
  .btn--sm{padding:7px 12px;font-size:12.5px}
  .nav-toggle{padding:8px 12px}
}

/* ---------- 降低动效 ---------- */
@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.js [data-reveal]:not(.is-visible){opacity:1;transform:none}
  .card:hover,.card:focus-within{transform:none}
  .btn--signal:hover,.btn--outline:hover{transform:none}
}