/* ==========================================================
   B体育赛场 · 共享样式 /assets/site.css
   纵向叙事长卷 + 珠宝色分区 + 玻璃层与实色层并置
   ========================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Design tokens ---------- */
:root{
  --arena:#0B1733;
  --indigo:#1E1B4B;
  --teal:#0A3B36;
  --wine:#7A1330;
  --sunset:#FF6A2B;
  --gold:#FFB347;
  --signal:#2BE08A;
  --sand:#F5EFE6;
  --ink:#0A0C12;
  --haze:#C9C4E8;
  --paper:#FFFDF8;

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --radius:20px;
  --radius-sm:14px;
  --radius-pill:999px;
  --header-h:78px;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shadow-deep:0 26px 60px -34px rgba(10,12,18,.95);
  --shadow-soft:0 22px 46px -36px rgba(10,12,18,.7);
  --scroll-progress:0;
}

/* ---------- 3. Base typography ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--sand);
  padding-top:calc(var(--header-h) + 14px);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-weight:900;line-height:1.2;letter-spacing:-.02em}
h1{font-size:clamp(32px,5.2vw,56px)}
h2{font-size:clamp(26px,4vw,44px)}
h3{font-size:clamp(20px,2.6vw,28px)}
strong{font-weight:700}
time,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:8px}

/* ---------- 4. Layout primitives ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{position:relative;padding-block:clamp(52px,7vw,104px)}
.section--dark{background:var(--arena);color:var(--sand)}
.section--indigo{background:var(--indigo);color:var(--sand)}
.section--teal{background:var(--teal);color:var(--sand)}
.section--sand{background:var(--sand);color:var(--ink)}
.section--dark .lede,.section--indigo .lede,.section--teal .lede{color:var(--haze)}

.chapter-head{
  display:flex;align-items:flex-end;flex-wrap:wrap;gap:14px 20px;
  margin-bottom:clamp(22px,3vw,38px);
}
.chapter-num{
  font-family:var(--font-mono);font-weight:600;line-height:1;
  font-size:clamp(28px,4vw,44px);color:var(--sunset);
}
.chapter-band{
  flex:1 1 120px;height:6px;border-radius:6px;margin-bottom:9px;
  background:linear-gradient(90deg,var(--sunset),var(--gold));
}
.chapter-title{font-size:clamp(28px,4.6vw,44px);font-weight:900;letter-spacing:-.02em}
.lede{font-size:17px;line-height:1.85;max-width:38ch;opacity:.92}

.card-grid{display:grid;gap:clamp(14px,2vw,24px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.glass-panel{
  position:relative;border-radius:var(--radius);
  padding:clamp(16px,2.4vw,26px);
  background:rgba(245,239,230,.08);
  border:1px solid rgba(201,196,232,.22);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:background .16s ease,border-color .16s ease;
}
.glass-panel:hover{background:rgba(245,239,230,.14);border-color:rgba(255,106,43,.55)}
.solid-panel{
  border-radius:var(--radius);
  padding:clamp(16px,2.4vw,26px);
  background:var(--paper);color:var(--ink);
  border:1px solid rgba(10,12,18,.08);
  box-shadow:var(--shadow-soft);
}
.data-card{
  display:flex;flex-direction:column;gap:12px;
  border-radius:var(--radius);
  padding:clamp(16px,2.2vw,24px);
  background:var(--paper);color:var(--ink);
  border:1px solid rgba(10,12,18,.09);
  box-shadow:var(--shadow-soft);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.data-card:hover{border-color:var(--sunset);box-shadow:0 26px 52px -34px rgba(255,106,43,.55)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-num{
  font-family:var(--font-mono);font-weight:600;line-height:1;
  font-size:clamp(26px,4vw,38px);
  color:var(--arena);background:rgba(255,106,43,.16);
  padding:3px 10px;border-radius:10px;align-self:flex-start;
}
.section--dark .stat-num,.section--indigo .stat-num,.section--teal .stat-num{color:var(--gold);background:rgba(255,179,71,.14)}
.stat-label{font-size:13px;letter-spacing:.08em;opacity:.78}

.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 11px;
  border-radius:var(--radius-pill);font-size:12px;font-weight:700;letter-spacing:.02em;
  background:rgba(201,196,232,.16);color:var(--indigo);
  border:1px solid rgba(30,27,75,.18);
}
.tag--wine{background:rgba(122,19,48,.12);color:var(--wine);border-color:rgba(122,19,48,.4)}
.tag--signal{background:rgba(43,224,138,.16);color:#0B6B45;border-color:rgba(43,224,138,.5)}

/* ---------- 5. Buttons & pills ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;
  transition:background .12s ease,border-color .12s ease,color .12s ease;
}
.btn--primary{background:linear-gradient(120deg,var(--sunset),#FF8A3D);color:#1A0A03}
.btn--primary:hover{background:linear-gradient(120deg,var(--gold),var(--sunset))}
.btn--ghost{border-color:var(--haze);color:inherit}
.btn--ghost:hover{border-color:var(--sunset);color:var(--sunset)}

.pill{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:36px;padding:0 15px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:700;letter-spacing:.02em;white-space:nowrap;
  border:1px solid transparent;
  transition:background .12s ease,border-color .12s ease,color .12s ease;
}
.pill--ghost{color:var(--sand);border-color:rgba(201,196,232,.35)}
.pill--ghost:hover{border-color:var(--sunset);color:var(--gold)}
.pill--accent{background:linear-gradient(120deg,var(--sunset),#FF8A3D);color:#1A0A03}
.pill--accent:hover{background:linear-gradient(120deg,var(--gold),var(--sunset))}

/* ---------- 6. Header : floating capsule ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  padding:14px var(--gutter) 0;
  pointer-events:none;
}
.site-header .nav-shell,
.site-header .skip-link{pointer-events:auto}

.nav-shell{position:relative;max-width:var(--shell);margin-inline:auto}
.nav-shell::after{
  content:"";position:absolute;left:26px;right:26px;bottom:-8px;height:3px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--sunset),var(--gold) 55%,var(--signal));
  transform:scaleX(var(--scroll-progress,0));transform-origin:left center;
  opacity:.9;transition:transform .1s linear;
}

.nav-bar{
  position:relative;display:flex;align-items:center;
  gap:clamp(10px,1.5vw,22px);
  padding:9px 12px 9px 16px;
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(11,23,51,.92),rgba(30,27,75,.86));
  border:1px solid rgba(201,196,232,.2);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  box-shadow:var(--shadow-deep);
  transition:padding .18s ease,background .18s ease,box-shadow .18s ease;
}

.brand{display:inline-flex;align-items:center;gap:10px;color:var(--sand);flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:12px;display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:700;font-size:18px;color:#1A0A03;
  background:linear-gradient(140deg,var(--sunset),var(--gold));
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:900;font-size:16px;letter-spacing:.01em;white-space:nowrap}
.brand-short{display:none;font-weight:900;font-size:14px;letter-spacing:.02em;white-space:nowrap}

.brand-status{
  display:flex;align-items:center;gap:8px;white-space:nowrap;
  font-size:12px;letter-spacing:.03em;color:var(--haze);
  padding-right:14px;border-right:1px solid rgba(201,196,232,.2);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--signal);
  animation:signal-pulse 2.6s ease-in-out infinite;
}
.status-time{font-size:12px;color:var(--signal)}
@keyframes signal-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(43,224,138,.55)}
  50%{box-shadow:0 0 0 7px rgba(43,224,138,0)}
}

.nav-toggle{
  display:none;align-items:center;gap:9px;height:38px;padding:0 14px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(201,196,232,.35);color:var(--sand);
  font-size:13px;font-weight:700;
  transition:border-color .12s ease,color .12s ease;
}
.nav-toggle:hover{border-color:var(--sunset);color:var(--gold)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .16s ease,opacity .16s ease}
.site-header[data-open] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-text{white-space:nowrap}

.nav-cluster{
  display:flex;align-items:center;justify-content:flex-end;
  gap:clamp(8px,1.2vw,18px);
  margin-left:auto;min-width:0;flex:1 1 auto;
}
.site-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,.8vw,12px);flex-wrap:nowrap}
.nav-link{
  position:relative;display:inline-block;padding:6px 9px;
  font-size:14px;font-weight:700;color:rgba(245,239,230,.86);white-space:nowrap;
  transition:color .12s ease;
}
.nav-link::after{
  content:"";position:absolute;left:9px;right:9px;bottom:1px;height:2px;border-radius:2px;
  background:var(--sunset);transform:scaleX(0);transform-origin:left center;
  transition:transform .16s ease;
}
.nav-link:hover{color:var(--sand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:linear-gradient(90deg,var(--sunset),var(--gold))}
.nav-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}

/* 收缩态（桌面） */
@media (min-width:1025px){
  .site-header[data-condensed] .nav-bar{padding:6px 10px 6px 13px;background:linear-gradient(120deg,rgba(11,23,51,.97),rgba(30,27,75,.94))}
  .site-header[data-condensed] .brand-status{display:none}
  .site-header[data-condensed] .brand-name{display:none}
  .site-header[data-condensed] .brand-short{display:inline}
  .site-header[data-condensed] .nav-link[data-tier="2"]{display:none}
  .site-header[data-condensed] .nav-actions{display:none}
  .site-header[data-condensed] .nav-toggle{display:inline-flex}
  .site-header[data-condensed][data-open] .nav-cluster{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:12px;padding:14px;border-radius:26px;
    background:linear-gradient(150deg,rgba(11,23,51,.97),rgba(30,27,75,.95));
    border:1px solid rgba(201,196,232,.22);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    box-shadow:var(--shadow-deep);
  }
  .site-header[data-condensed][data-open] .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .site-header[data-condensed][data-open] .nav-link{display:block;padding:12px 14px;font-size:16px;border-radius:var(--radius-sm)}
  .site-header[data-condensed][data-open] .nav-link::after{left:14px;right:14px;bottom:7px}
  .site-header[data-condensed][data-open] .nav-link[data-tier="2"]{display:block}
  .site-header[data-condensed][data-open] .nav-actions{display:flex;flex-direction:column;align-items:stretch}
  .site-header[data-condensed][data-open] .pill{height:44px}
}

/* 移动与窄屏：胶囊下方抽屉 */
@media (max-width:1024px){
  .brand-status{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-cluster{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:12px;padding:14px;border-radius:26px;
    background:linear-gradient(150deg,rgba(11,23,51,.97),rgba(30,27,75,.95));
    border:1px solid rgba(201,196,232,.22);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    box-shadow:var(--shadow-deep);
    max-height:min(72vh,560px);overflow-y:auto;
  }
  .site-header[data-open] .nav-cluster{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:12px 14px;font-size:16px;border-radius:var(--radius-sm)}
  .nav-link::after{left:14px;right:14px;bottom:7px}
  .nav-actions{flex-direction:column;align-items:stretch}
  .nav-actions .pill{height:44px}
}
@media (max-width:1180px) and (min-width:1025px){
  .brand-status{display:none}
}
@media (max-width:560px){
  .nav-toggle-text{display:none}
  .nav-toggle{padding:0 12px}
  .brand-name{font-size:15px}
}

/* ---------- 7. Skip link ---------- */
.skip-link{
  position:fixed;top:-90px;left:50%;transform:translateX(-50%);z-index:90;
  display:inline-flex;align-items:center;height:42px;padding:0 20px;
  border-radius:var(--radius-pill);
  background:var(--sunset);color:#1A0A03;font-size:14px;font-weight:700;
  box-shadow:var(--shadow-deep);
  transition:top .16s ease;
}
.skip-link:focus{top:12px}

/* ---------- 8. Footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(52px,8vw,110px);
  padding:clamp(52px,7vw,92px) var(--gutter) clamp(26px,4vw,44px);
  background:linear-gradient(180deg,var(--arena) 0%,#0A1230 52%,var(--indigo) 100%);
  color:var(--sand);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:5px;
  background:linear-gradient(90deg,var(--sunset),var(--gold) 45%,var(--signal));
}
.site-footer::after{
  content:"";position:absolute;right:-12%;top:-32%;width:56%;height:140%;
  background:radial-gradient(closest-side,rgba(255,106,43,.18),transparent 72%);
  pointer-events:none;
}
.footer-inner{
  position:relative;z-index:1;
  max-width:var(--shell);margin-inline:auto;
  display:grid;gap:clamp(26px,4vw,54px);
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-tagline{font-size:15px;line-height:1.8;color:var(--haze);max-width:30ch}
.footer-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer-col-title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.14em;color:var(--gold);
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-link{
  position:relative;display:inline-block;
  font-size:15px;color:rgba(245,239,230,.82);
  transition:color .12s ease;
}
.footer-link::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;
  background:var(--sunset);transform:scaleX(0);transform-origin:left center;
  transition:transform .16s ease;
}
.footer-link:hover{color:var(--sand)}
.footer-link:hover::after{transform:scaleX(1)}
.footer-link[aria-current="page"]{color:var(--gold);font-weight:700}
.footer-link[aria-current="page"]::after{transform:scaleX(1)}
.footer-meta .footer-line{font-size:14px;line-height:1.75;color:var(--haze);word-break:break-word}
.footer-legal{
  position:relative;z-index:1;
  max-width:var(--shell);margin:clamp(32px,5vw,58px) auto 0;
  padding-top:20px;
  border-top:1px solid rgba(201,196,232,.2);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 26px;
}
.footer-legal .footer-line{font-size:13px;color:var(--haze)}
.legal-links{display:flex;flex-wrap:wrap;gap:18px}
.legal-links .footer-link{font-size:13px}

/* ---------- 9. Fixed dock ---------- */
.dock{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:55;
  display:flex;flex-direction:column;align-items:flex-end;gap:8px;
}
.dock-link{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;
  border-radius:var(--radius-pill);
  font-size:13px;font-weight:700;white-space:nowrap;
  color:var(--sand);background:rgba(11,23,51,.88);
  border:1px solid rgba(201,196,232,.28);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-soft);
  transition:border-color .12s ease,color .12s ease,background .12s ease;
}
.dock-link:hover{border-color:var(--sunset);color:var(--gold)}
.dock-link--accent{
  background:linear-gradient(120deg,var(--sunset),#FF8A3D);
  color:#1A0A03;border-color:transparent;
}
.dock-link--accent:hover{background:linear-gradient(120deg,var(--gold),var(--sunset));color:#1A0A03}
.dock-top{
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;color:var(--sand);
  background:rgba(11,23,51,.88);
  border:1px solid rgba(201,196,232,.28);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s ease,border-color .12s ease;
}
.dock-top[data-visible]{opacity:1;visibility:visible;transform:none}
.dock-top:hover{border-color:var(--sunset);color:var(--gold)}

/* ---------- 10. Breadcrumb & prose ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--haze)}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item+.breadcrumb-item::before{content:"/";color:rgba(201,196,232,.5)}
.breadcrumb-current{color:var(--gold);font-weight:700}
.section--sand .breadcrumb,.section--sand .breadcrumb-current{color:var(--indigo)}
.section--sand .breadcrumb-current{color:var(--wine)}

.prose{max-width:38em;font-size:17px;line-height:1.85}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(22px,3vw,30px);font-weight:900;letter-spacing:-.01em;line-height:1.3;margin-top:1.7em}
.prose h3{font-size:20px;font-weight:700;line-height:1.35;margin-top:1.5em}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em}
.prose li+li{margin-top:.5em}
.prose strong{color:var(--wine)}
.section--dark .prose strong,.section--indigo .prose strong,.section--teal .prose strong{color:var(--gold)}

/* ---------- 11. Media frames (供页面阶段放图) ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--indigo),var(--arena));
  aspect-ratio:4/3;isolation:isolate;
}
.media-frame img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(1.05) contrast(1.04);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(201,196,232,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,196,232,.16) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.7;
}
.media-frame::before{
  content:"";position:absolute;inset:auto 0 0 0;height:42%;pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(11,23,51,.72));
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--band{aspect-ratio:21/9}
.media-note{
  display:block;margin-top:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--haze);
}
.section--sand .media-note{color:rgba(30,27,75,.72)}

/* ---------- 12. Motion preferences ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .status-dot{animation:none;box-shadow:none}
  .nav-shell::after{transition:none}
}