/* =========================================================
   OBO体育主站 · /assets/site.css
   共享外壳（头部 / 页脚）+ 通用组件 + 基础排版
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

:root{
  --ink:#0B1B33;          /* 深空蓝 */
  --ink-deep:#070B12;     /* 墨黑 / 夜底 */
  --panel:#142A47;        /* 夜幕蓝 */
  --panel-2:#1B3557;
  --orange:#F2681F;       /* 高原日落橙 */
  --orange-soft:#FFA45B;  /* 余晖浅橙 */
  --mint:#2BE8B0;         /* 荧光青绿 */
  --paper:#F2E6D2;        /* 暖纸色 */
  --paper-white:#FCF8F1;  /* 纸白 */
  --steel:#7E97B4;        /* 钢蓝灰 */
  --steel-light:#C9D8E8;
  --edge:#070B12;         /* 硬边 */
  --alert:#E2445C;        /* 赛况红 */

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

  --shadow-hard:8px 8px 0 var(--edge);
  --shadow-hard-sm:4px 4px 0 var(--edge);
  --shell:min(1240px,92vw);
  --pill:999px;
}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background-color:var(--ink);
  color:var(--steel-light);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  background-image:
    linear-gradient(rgba(126,151,180,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126,151,180,.07) 1px, transparent 1px),
    radial-gradient(1100px 620px at 84% -12%, rgba(242,104,31,.22), transparent 62%),
    radial-gradient(900px 520px at -6% 108%, rgba(43,232,176,.12), transparent 58%);
  background-size:64px 64px, 64px 64px, auto, auto;
}

h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  color:var(--paper-white);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.16;
}

h1{ font-size:clamp(30px,5.2vw,60px); }
h2{ font-size:clamp(24px,3.4vw,40px); }
h3{ font-size:clamp(19px,2.2vw,26px); }

p{ margin:0 0 1em; }

a{ color:var(--orange-soft); }

img{ max-width:100%; display:block; }

button{ font:inherit; }

:focus-visible{
  outline:3px solid var(--mint);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 通用排版工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

.eyebrow{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mint);
}

.lede{
  margin:0;
  font-family:var(--font-serif);
  font-size:clamp(17px,2vw,21px);
  line-height:1.65;
  color:var(--paper);
}

.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.75;
  color:var(--steel-light);
}
.prose > * + *{ margin-top:1em; }
.prose strong{ color:var(--paper-white); }
.prose a{ color:var(--orange-soft); }

.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;
}

/* ---------- 布局骨架 ---------- */
.shell{
  width:var(--shell);
  margin-inline:auto;
}

.section{
  padding:clamp(48px,7vw,104px) 0;
  position:relative;
}

.section--paper{
  background:var(--paper);
  color:var(--ink);
  border-top:2px solid var(--edge);
  border-bottom:2px solid var(--edge);
}
.section--paper h1,
.section--paper h2,
.section--paper h3{ color:var(--ink); }
.section--paper .lede{ color:#26374F; }
.section--paper .prose{ color:#22314A; }
.section--paper .prose strong{ color:var(--ink); }
.section--paper .eyebrow{ color:#0F6F55; }

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.col-3{ grid-column:span 3; }
.col-4{ grid-column:span 4; }
.col-5{ grid-column:span 5; }
.col-6{ grid-column:span 6; }
.col-7{ grid-column:span 7; }
.col-8{ grid-column:span 8; }
.col-9{ grid-column:span 9; }
.col-12{ grid-column:1 / -1; }

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,27,51,.9);
  border-bottom:2px solid var(--edge);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  font-weight:800;
  text-decoration:none;
}
.skip-link:focus{
  position:fixed;
  left:14px;
  top:14px;
  z-index:120;
  padding:10px 20px;
  background:var(--mint);
  color:var(--edge);
  border:2px solid var(--edge);
  border-radius:var(--pill);
  box-shadow:var(--shadow-hard-sm);
}

.read-progress{
  position:fixed;
  top:0; left:0; right:0;
  height:3px;
  background:rgba(126,151,180,.16);
  z-index:90;
  pointer-events:none;
}
.read-progress-fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--mint),var(--orange));
  transition:width .12s linear;
}

.header-inner{
  position:relative;
  width:var(--shell);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(14px,3vw,40px);
  padding:14px 0;
  transition:padding .2s ease;
}

.brand-block{
  display:flex;
  align-items:center;
  gap:16px;
  min-width:0;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper-white);
}

.brand-mark{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:15px;
  letter-spacing:.14em;
  padding:6px 10px;
  background:var(--orange);
  color:var(--edge);
  border:2px solid var(--edge);
  border-radius:12px;
  box-shadow:3px 3px 0 var(--edge);
  transform:rotate(-3deg);
}

.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}

.brand-name{
  font-weight:900;
  font-size:18px;
  letter-spacing:-.02em;
}

.brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--steel);
}

.brand-tagline{
  margin:0;
  padding-left:12px;
  border-left:2px solid rgba(43,232,176,.65);
  font-size:13px;
  color:var(--steel);
  transition:opacity .2s ease;
}

.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:9px 16px;
  background:var(--panel);
  color:var(--paper-white);
  border:2px solid var(--edge);
  border-radius:var(--pill);
  box-shadow:var(--shadow-hard-sm);
  font-weight:800;
  font-size:14px;
  cursor:pointer;
}
.nav-toggle-text{ letter-spacing:.06em; }

.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:var(--paper-white);
  border-radius:2px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:inherit;
  border-radius:2px;
  transition:transform .2s ease, top .2s ease;
}
.nav-toggle-bars::before{ top:-6px; }
.nav-toggle-bars::after{ top:6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{ background:var(--mint); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{ top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{ top:0; transform:rotate(-45deg); }

.site-nav{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px;
  background:var(--panel);
  border:2px solid var(--edge);
  border-radius:var(--pill);
  box-shadow:var(--shadow-hard-sm);
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}

.nav-link{
  display:block;
  padding:9px 15px;
  border-radius:var(--pill);
  color:var(--steel-light);
  font-weight:700;
  font-size:15px;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s ease, color .18s ease;
}
.nav-link:hover{
  background:rgba(242,104,31,.18);
  color:var(--paper-white);
}
.nav-link[aria-current="page"]{
  background:var(--mint);
  color:var(--edge);
  box-shadow:inset 0 0 0 2px var(--edge);
}

.header-rail{
  width:var(--shell);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:14px;
  padding:10px 0 12px;
  border-top:1px dashed rgba(126,151,180,.24);
}

.nav-utility{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}

.nav-util-link{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--steel);
  text-decoration:none;
  padding:6px 12px;
  border:1px dashed rgba(126,151,180,.5);
  border-radius:var(--pill);
  white-space:nowrap;
  transition:color .18s ease, border-color .18s ease;
}
.nav-util-link:hover{
  color:var(--mint);
  border-color:var(--mint);
}

.site-header[data-compact]{
  background:rgba(11,27,51,.97);
}
.site-header[data-compact] .header-inner{ padding:6px 0; }
.site-header[data-compact] .brand-tagline{
  opacity:0;
  visibility:hidden;
}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:2px solid var(--edge);
  background-color:var(--ink-deep);
  background-image:linear-gradient(to bottom, rgba(126,151,180,.07) 1px, transparent 1px);
  background-size:100% 46px;
  color:var(--steel-light);
  padding:clamp(36px,6vw,72px) 0 26px;
}

.footer-inner{
  width:var(--shell);
  margin-inline:auto;
  display:grid;
  grid-template-columns:1fr 2.6fr;
  gap:clamp(20px,4vw,56px);
  align-items:start;
}

.footer-mark{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.18em;
  padding:6px 12px;
  background:var(--mint);
  color:var(--edge);
  border:2px solid var(--edge);
  border-radius:10px;
  box-shadow:3px 3px 0 var(--edge);
}

.footer-slogan{
  margin:16px 0 0;
  font-family:var(--font-serif);
  font-size:clamp(18px,2.4vw,24px);
  line-height:1.5;
  color:var(--paper);
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}

.footer-col-title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mint);
}

.footer-links{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-links a{
  color:var(--steel-light);
  font-size:15px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease, border-color .18s ease;
}
.footer-links a:hover{
  color:var(--orange-soft);
  border-color:var(--orange-soft);
}

.footer-meta{
  width:var(--shell);
  margin:clamp(28px,4vw,48px) auto 0;
  padding-top:18px;
  border-top:1px dashed rgba(126,151,180,.35);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  font-size:13px;
  color:var(--steel);
}

.footer-contact{
  margin:0;
  flex:1 1 340px;
}

.footer-legal{
  margin:0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
}
.footer-legal .mono{ color:var(--steel-light); }
.footer-legal a{
  color:var(--steel-light);
  text-decoration:none;
  border-bottom:1px solid rgba(126,151,180,.5);
}
.footer-legal a:hover{
  color:var(--orange-soft);
  border-color:var(--orange-soft);
}

.to-top{
  margin-left:auto;
  padding:8px 18px;
  background:var(--mint);
  color:var(--edge);
  border:2px solid var(--edge);
  border-radius:var(--pill);
  box-shadow:var(--shadow-hard-sm);
  font-weight:800;
  font-size:14px;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease;
}
.to-top:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 var(--edge);
}

.footer-copy{
  flex:1 1 100%;
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(126,151,180,.85);
}

/* ---------- 通用组件 ---------- */
.capsule{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  border:2px solid var(--edge);
  border-radius:var(--pill);
  font-weight:800;
  font-size:15px;
  text-decoration:none;
  box-shadow:var(--shadow-hard-sm);
  transition:transform .18s ease, box-shadow .18s ease;
}
.capsule:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 var(--edge);
}
.capsule--primary{
  background:var(--orange);
  color:var(--edge);
}
.capsule--mint{
  background:var(--mint);
  color:var(--edge);
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:2px solid var(--edge);
  border-radius:var(--pill);
  box-shadow:var(--shadow-hard-sm);
  font-weight:800;
  font-size:16px;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 var(--edge);
}
.btn--primary{
  background:var(--orange);
  color:var(--edge);
}
.btn--mint{
  background:var(--mint);
  color:var(--edge);
}
.btn--ghost{
  background:transparent;
  color:var(--paper-white);
  border-color:var(--steel-light);
}

.panel{
  position:relative;
  padding:clamp(20px,3vw,36px);
  background:var(--panel);
  border:2px solid var(--edge);
  border-radius:22px;
  box-shadow:var(--shadow-hard);
}

.panel--paper{
  background:var(--paper);
  color:var(--ink);
}
.panel--paper h2,
.panel--paper h3,
.panel--paper .panel-title{ color:var(--ink); }
.panel--paper .panel-num{ color:#0F6F55; }

.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:18px;
  padding-bottom:14px;
  border-bottom:2px solid rgba(126,151,180,.3);
}

.panel-num{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--mint);
}

.panel-title{
  margin:0;
  font-size:clamp(22px,3vw,32px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--steel);
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--steel);
}
.tag--mint{
  color:var(--mint);
  border-color:rgba(43,232,176,.55);
  background:rgba(43,232,176,.12);
}
.tag--orange{
  color:var(--orange-soft);
  border-color:rgba(255,164,91,.55);
  background:rgba(242,104,31,.16);
}
.tag--alert{
  color:var(--alert);
  border-color:rgba(226,68,92,.55);
  background:rgba(226,68,92,.14);
}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(34px,6vw,72px);
  font-weight:800;
  line-height:1;
  color:var(--paper-white);
}
.stat-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--steel);
}

.breadcrumb{
  margin:0 0 clamp(16px,2vw,28px);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--steel);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb li + li::before{
  content:"/";
  margin-right:8px;
  color:rgba(126,151,180,.7);
}
.breadcrumb a{
  color:var(--steel-light);
  text-decoration:none;
}
.breadcrumb a:hover{ color:var(--orange-soft); }

/* 图片容器（供页面阶段放置占位图） */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--panel-2);
  border:2px solid var(--edge);
  border-radius:18px;
  box-shadow:var(--shadow-hard);
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:4 / 5; }
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-tag{
  position:absolute;
  left:14px;
  bottom:14px;
  padding:6px 12px;
  background:var(--paper-white);
  color:var(--edge);
  border:2px solid var(--edge);
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}

/* 侧边轮次锚点 */
.anchor-rail{
  display:flex;
  flex-direction:column;
  gap:8px;
  position:sticky;
  top:150px;
}
.anchor-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border:1px dashed rgba(126,151,180,.45);
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--steel);
  text-decoration:none;
  transition:color .2s ease, border-color .2s ease, background .2s ease;
}
.anchor-link:hover{
  color:var(--paper-white);
  border-color:var(--steel-light);
}
.anchor-link.is-current{
  background:var(--mint);
  color:var(--edge);
  border:2px solid var(--edge);
}

/* 显现动效 */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .42s ease, transform .42s ease;
}
.reveal.is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .brand-tagline{ display:none; }
}

@media (max-width:1024px){
  .nav-toggle{ display:inline-flex; }

  .brand-block{ flex:1 1 auto; }

  .site-nav{
    display:none;
  }
  .site-nav[data-open]{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    margin-left:0;
    padding:12px;
    background:var(--ink);
    border:2px solid var(--edge);
    border-radius:22px;
    box-shadow:var(--shadow-hard);
  }
  .site-nav[data-open] .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    width:100%;
  }
  .site-nav[data-open] .nav-link{
    border-radius:14px;
    padding:13px 16px;
    font-size:16px;
  }

  .grid-12{ grid-template-columns:repeat(6,minmax(0,1fr)); }
  .col-3, .col-4, .col-5{ grid-column:span 6; }
  .col-6, .col-7, .col-8, .col-9, .col-12{ grid-column:1 / -1; }

  .footer-inner{ grid-template-columns:1fr; }
  .footer-cols{ grid-template-columns:repeat(2,minmax(0,1fr)); }

  .anchor-rail{
    position:static;
    flex-direction:row;
    flex-wrap:wrap;
  }
}

@media (max-width:680px){
  body{ font-size:16px; }

  .header-rail{
    flex-wrap:wrap;
    gap:10px;
  }
  .nav-utility{
    margin-left:0;
    flex:1 1 100%;
  }
  .capsule{ font-size:14px; padding:7px 15px; }

  .grid-12{ grid-template-columns:1fr; }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12{
    grid-column:1 / -1;
  }

  .footer-cols{ grid-template-columns:1fr; }
  .to-top{ margin-left:0; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{
    opacity:1;
    transform:none;
  }
  .read-progress-fill{ transition:none; }
}