/* ============================================================
   星空体育官网 — 共享样式表 /assets/site.css
   视觉母题：夜航球场 × 深空星云
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  /* 色彩系统 */
  --space-ink:#05070F;
  --space-blue:#0B1226;
  --nebula-indigo:#101A38;
  --orbit-blue:#1B2A55;
  --nebula-purple:#6C4BF4;
  --electric-cyan:#33E1E0;
  --city-sky:#7FC4EA;
  --amber:#FFB03A;
  --deep-teal:#0E2C28;
  --wine-indigo:#3A1030;
  --star-white:#F5F7FF;
  --star-grey:#A9B4D0;

  /* 字体 */
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Cascadia Mono",Menlo,Consolas,"Courier New",monospace;

  /* 排版刻度 */
  --fs-index:12px;  --lh-index:16px;
  --fs-note:14px;   --lh-note:22px;
  --fs-body:16px;   --lh-body:28px;
  --fs-h3:22px;     --lh-h3:32px;
  --fs-h2:34px;     --lh-h2:42px;
  --fs-hero:56px;   --lh-hero:60px;

  /* 结构 */
  --rail-w:268px;
  --maxw:1240px;
  --gutter:clamp(20px,4vw,56px);
  --radius-sm:6px;
  --radius-md:14px;
  --radius-lg:28px;
  --ease:cubic-bezier(.22,.61,.36,1);

  /* 渐变 */
  --grad-nebula:linear-gradient(135deg,#6C4BF4 0%,#33E1E0 100%);
  --grad-deep:linear-gradient(160deg,#0B1226 0%,#05070F 72%);
  --grad-sky:linear-gradient(135deg,#7FC4EA 0%,#33E1E0 100%);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100%;
  background-color:var(--space-ink);
  background-image:
    radial-gradient(900px 620px at 84% -12%, rgba(108,75,244,.22), transparent 62%),
    radial-gradient(780px 540px at 2% 104%, rgba(51,225,224,.11), transparent 60%);
  background-attachment:fixed;
  color:var(--star-white);
  font-family:var(--font-display);
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{list-style:none;margin:0;padding:0;}
a{color:inherit;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--electric-cyan);outline-offset:3px;border-radius:2px;}

/* 中文排版约束 */
p,li{max-width:38em;}
h1,h2,h3{max-width:24em;}

/* ---------- 3. 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid{display:grid;gap:24px;}
.grid--halves{grid-template-columns:1fr;}
@media (min-width:768px){
  .grid--halves{grid-template-columns:repeat(2,minmax(0,1fr));}
}

/* 桌面端为左侧轨道让位 */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-80px;
  z-index:300;
  padding:11px 20px;
  background:var(--electric-cyan);
  color:var(--space-ink);
  font-size:var(--fs-note);
  font-weight:700;
  text-decoration:none;
  border-radius:var(--radius-sm);
  box-shadow:0 0 28px rgba(51,225,224,.45);
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px;}

/* ---------- 5. 头部（移动端：顶部条） ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px var(--gutter);
  background:rgba(6,9,20,.96);
  border-bottom:1px solid var(--orbit-blue);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(108,75,244,.7),rgba(51,225,224,.7),transparent);
  opacity:.7;
  pointer-events:none;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:1 1 auto;
  min-width:0;
  text-decoration:none;
  color:var(--star-white);
}
.brand__orbit{
  position:relative;
  flex:0 0 auto;
  width:34px;
  height:34px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 28%, #33E1E0 0%, #6C4BF4 54%, #0B1226 100%);
  box-shadow:0 0 0 1px rgba(51,225,224,.35), 0 0 24px rgba(108,75,244,.5);
}
.brand__orbit::after{
  content:"";
  position:absolute;
  inset:-6px;
  border-radius:50%;
  border:1px dashed rgba(127,196,234,.4);
}
.brand__text{display:flex;flex-direction:column;gap:1px;min-width:0;}
.brand__name{
  font-size:16px;
  font-weight:800;
  letter-spacing:.03em;
  line-height:1.25;
  white-space:nowrap;
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:14px;
  letter-spacing:.05em;
  color:var(--star-grey);
  white-space:nowrap;
}
@media (max-width:639px){
  .brand__tag{display:none;}
}

/* 移动导航按钮 */
.nav-toggle{
  flex:0 0 auto;
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:46px;
  height:46px;
  padding:0 12px;
  background:rgba(27,42,85,.55);
  border:1px solid var(--orbit-blue);
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--electric-cyan);}
.nav-toggle__bar{
  display:block;
  height:2px;
  width:100%;
  border-radius:2px;
  background:var(--city-sky);
  transition:transform .3s var(--ease),opacity .2s linear,background-color .22s;
}
.nav-toggle[aria-expanded="true"]{border-color:var(--electric-cyan);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar{background:var(--electric-cyan);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 主导航（移动端：抽屉） */
.site-nav{
  position:fixed;
  top:0;bottom:0;left:0;
  z-index:120;
  width:min(320px,84vw);
  padding:92px 22px 34px;
  background:linear-gradient(168deg,#101A38 0%,#0B1226 46%,#05070F 100%);
  border-right:1px solid var(--orbit-blue);
  transform:translateX(-102%);
  visibility:hidden;
  overflow-y:auto;
  transition:transform .42s var(--ease),visibility .42s linear;
}
.site-nav::before{
  content:"";
  position:absolute;
  top:-60px;left:-40px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(closest-side,rgba(108,75,244,.42),transparent 72%);
  pointer-events:none;
}
.site-nav[data-open]{
  transform:translateX(0);
  visibility:visible;
}
.site-nav__list{
  counter-reset:navidx;
  display:flex;
  flex-direction:column;
  gap:3px;
}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding:13px 14px;
  border-radius:var(--radius-sm);
  color:var(--star-grey);
  text-decoration:none;
  font-size:17px;
  letter-spacing:.01em;
  transition:color .22s var(--ease),background-color .22s var(--ease);
}
.site-nav__link::before{
  counter-increment:navidx;
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  letter-spacing:.08em;
  color:rgba(169,180,208,.55);
  transition:color .22s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{
  color:var(--star-white);
  background:rgba(51,225,224,.07);
}
.site-nav__link:hover::before{color:var(--electric-cyan);}
.site-nav__link[aria-current="page"]{
  color:var(--star-white);
  font-weight:600;
  background:linear-gradient(90deg,rgba(108,75,244,.3),rgba(51,225,224,.05));
}
.site-nav__link[aria-current="page"]::before{color:var(--electric-cyan);}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:62%;
  border-radius:0 3px 3px 0;
  background:var(--grad-nebula);
}

/* 抽屉遮罩 */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(5,7,15,.74);
  opacity:0;
  pointer-events:none;
  transition:opacity .32s var(--ease);
}
.nav-scrim[data-open]{opacity:1;pointer-events:auto;}
body.is-nav-open{overflow:hidden;}

/* 轮次指示（移动端隐藏） */
.header-meta{display:none;}

/* 滚动进度线（移动端：头部底缘横线） */
.header-progress{
  position:absolute;
  left:0;bottom:0;
  height:2px;
  width:calc(var(--progress,0) * 100%);
  background:var(--grad-nebula);
  pointer-events:none;
}

/* ---------- 6. 头部（桌面端：左侧垂直轨道） ---------- */
@media (min-width:1024px){
  .site-header{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--rail-w);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:32px 22px 28px;
    background:linear-gradient(180deg,#0B1226 0%,#06090F 100%);
    border-bottom:0;
    border-right:1px solid var(--orbit-blue);
  }
  .site-header::after{
    left:auto;right:-1px;top:0;bottom:0;
    width:1px;height:auto;
    background:linear-gradient(180deg,transparent,rgba(108,75,244,.65),rgba(51,225,224,.55),transparent);
  }
  .brand{
    flex:0 0 auto;
    align-items:flex-start;
    gap:13px;
  }
  .brand__text{gap:3px;}
  .brand__name{font-size:17px;}

  .nav-toggle,.nav-scrim{display:none;}

  .site-nav{
    position:static;
    width:auto;
    margin-top:38px;
    padding:0;
    background:none;
    border:0;
    transform:none;
    visibility:visible;
    overflow:visible;
    transition:none;
  }
  .site-nav::before{display:none;}
  .site-nav__list{gap:2px;}
  .site-nav__link{
    padding:11px 14px;
    font-size:15.5px;
  }

  .header-meta{
    display:flex;
    flex-direction:column;
    gap:4px;
    margin-top:auto;
    padding-top:20px;
    border-top:1px solid rgba(27,42,85,.9);
  }
  .header-meta__label{
    font-family:var(--font-mono);
    font-size:11px;
    line-height:16px;
    letter-spacing:.2em;
    text-transform:uppercase;
    color:rgba(169,180,208,.6);
  }
  .header-meta__value{
    font-family:var(--font-mono);
    font-size:13px;
    line-height:20px;
    letter-spacing:.04em;
    color:var(--city-sky);
  }

  .header-progress{
    left:auto;right:0;bottom:auto;top:0;
    width:2px;
    height:calc(var(--progress,0) * 100%);
    background:linear-gradient(180deg,#33E1E0 0%,#6C4BF4 100%);
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:linear-gradient(180deg,#06090F 0%,#0B1226 58%,#101A38 100%);
  border-top:1px solid var(--orbit-blue);
  overflow:hidden;
}
.footer__glow{
  position:absolute;
  top:-160px;left:-8%;
  width:min(760px,80%);
  height:380px;
  background:radial-gradient(closest-side,rgba(108,75,244,.3),transparent 72%);
  pointer-events:none;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(51,225,224,.6),rgba(108,75,244,.6),transparent);
  pointer-events:none;
}

.footer__inner{
  position:relative;
  z-index:1;
  display:grid;
  gap:44px;
  grid-template-columns:1fr;
  padding-block:64px 44px;
}
@media (min-width:768px){
  .footer__inner{grid-template-columns:minmax(0,1.05fr) minmax(0,2fr);gap:48px;}
}

.footer__brand{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:10px;
}
.footer__orbit{
  position:relative;
  width:28px;height:28px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 28%, #7FC4EA 0%, #6C4BF4 58%, #0B1226 100%);
  box-shadow:0 0 0 1px rgba(127,196,234,.35),0 0 20px rgba(108,75,244,.45);
  margin-bottom:4px;
}
.footer__name{
  font-size:22px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:.03em;
  color:var(--star-white);
}
.footer__tagline{
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.14em;
  color:var(--star-grey);
}

.footer__nav{
  display:grid;
  gap:28px;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
@media (min-width:768px){
  .footer__nav{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
}
.footer__col{min-width:0;}
.footer__coltitle{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.18em;
  color:var(--city-sky);
}
.footer__links{display:flex;flex-direction:column;gap:9px;}
.footer__link{
  display:inline-block;
  color:var(--star-grey);
  font-size:var(--fs-note);
  line-height:var(--lh-note);
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible{
  color:var(--electric-cyan);
  transform:translateX(4px);
}

.footer__contact{
  grid-column:1 / -1;
  display:grid;
  gap:8px;
  padding-top:26px;
  border-top:1px solid rgba(27,42,85,.9);
}
.footer__contactline{
  font-family:var(--font-mono);
  font-size:var(--fs-note);
  line-height:var(--lh-note);
  letter-spacing:.02em;
  color:var(--star-grey);
  max-width:none;
}
@media (min-width:1024px){
  .footer__contact{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:start;}
}

.footer__base{
  position:relative;
  z-index:1;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-block:22px 30px;
  border-top:1px solid rgba(27,42,85,.7);
}
@media (min-width:768px){
  .footer__base{flex-direction:row;align-items:center;justify-content:space-between;gap:24px;}
}
.footer__closing{
  font-size:var(--fs-note);
  line-height:var(--lh-note);
  color:var(--star-grey);
}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.06em;
  color:rgba(169,180,208,.75);
  max-width:none;
}
.footer__icp{color:var(--city-sky);}
.footer__sep{color:var(--orbit-blue);}

/* ---------- 8. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  letter-spacing:.02em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:transform .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--solid{
  background:var(--grad-nebula);
  color:#05070F;
  box-shadow:0 0 26px rgba(108,75,244,.35);
}
.btn--solid:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(51,225,224,.42);}
.btn--line{
  background:transparent;
  color:var(--electric-cyan);
  border-color:rgba(51,225,224,.45);
}
.btn--line:hover{
  background:rgba(51,225,224,.1);
  border-color:var(--electric-cyan);
  transform:translateY(-2px);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.08em;
  color:var(--star-grey);
}
.breadcrumb__link{
  color:var(--star-grey);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible{color:var(--electric-cyan);}
.breadcrumb__sep{color:var(--orbit-blue);}
.breadcrumb__current{color:var(--star-white);}

/* ---------- 10. 正文排版 ---------- */
.prose{
  max-width:36em;
  color:var(--star-grey);
  font-size:var(--fs-body);
  line-height:var(--lh-body);
}
.prose > * + *{margin-top:18px;}
.prose h2{
  margin:44px 0 16px;
  font-size:clamp(26px,3.4vw,var(--fs-h2));
  line-height:1.24;
  font-weight:800;
  letter-spacing:-.012em;
  color:var(--star-white);
}
.prose h3{
  margin:32px 0 12px;
  font-size:var(--fs-h3);
  line-height:var(--lh-h3);
  font-weight:700;
  color:var(--star-white);
}
.prose p{max-width:36em;}
.prose a{
  color:var(--electric-cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(51,225,224,.4);
  transition:border-color .2s var(--ease);
}
.prose a:hover{border-bottom-color:currentColor;}
.prose ul{list-style:disc;padding-left:1.35em;}
.prose ol{list-style:decimal;padding-left:1.5em;}
.prose li{max-width:34em;}
.prose li + li{margin-top:8px;}
.prose strong{color:var(--star-white);font-weight:700;}
.prose blockquote{
  padding:18px 22px;
  border-left:3px solid var(--amber);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  background:rgba(255,176,58,.07);
  color:var(--star-white);
}
.mark{
  padding:1px 6px;
  background:var(--amber);
  color:#05070F;
  font-weight:700;
  border-radius:3px;
}

/* ---------- 11. 板块标题组 ---------- */
.section{
  position:relative;
  padding-block:clamp(52px,7vw,100px);
}
.section__head{
  display:flex;
  flex-direction:column;
  gap:14px;
  max-width:52rem;
}
.section__eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--electric-cyan);
}
.section__eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:var(--electric-cyan);
}
.section__title{
  margin:0;
  font-size:clamp(26px,4vw,var(--fs-h2));
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.015em;
  color:var(--star-white);
  max-width:18em;
}
.section__note{
  margin:0;
  font-size:var(--fs-note);
  line-height:var(--lh-note);
  color:var(--star-grey);
  max-width:34rem;
}

/* ---------- 12. 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  border-radius:var(--radius-md);
  border:1px solid rgba(27,42,85,.9);
  background:linear-gradient(150deg,#101A38 0%,#05070F 100%);
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--cinema{aspect-ratio:21/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame > img,
.media-frame > .media-frame__img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  max-width:none;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(108,75,244,.18),transparent 46%,rgba(5,7,15,.6) 100%);
  pointer-events:none;
}
.media-frame__cap{
  position:absolute;
  left:0;bottom:0;
  z-index:1;
  padding:9px 16px;
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.08em;
  color:var(--star-white);
  background:linear-gradient(90deg,rgba(5,7,15,.94),rgba(5,7,15,0));
}

/* ---------- 13. 标签 ---------- */
.tag-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid rgba(127,196,234,.25);
  background:rgba(27,42,85,.55);
  color:var(--city-sky);
  font-family:var(--font-mono);
  font-size:var(--fs-index);
  line-height:var(--lh-index);
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag--cyan{
  color:var(--electric-cyan);
  border-color:rgba(51,225,224,.32);
  background:rgba(51,225,224,.07);
}
.tag--amber{
  color:var(--amber);
  border-color:rgba(255,176,58,.34);
  background:rgba(255,176,58,.08);
}

/* ---------- 14. 显现协议 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
}
.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 15. 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none;}
}