/* ===== 火博体育赛事 · 共享站点样式 /assets/site.css ===== */

:root{
  --hb-arena:#0B1014;
  --hb-panel:#161E24;
  --hb-line:#2A343C;
  --hb-cream:#F4F1EA;
  --hb-flare:#FF4E2B;
  --hb-amber:#FF8A3D;
  --hb-cyan:#2FD2E4;
  --hb-teal:#0E6E80;
  --hb-moss:#5E7D63;
  --hb-clay:#A8543C;
  --hb-warn:#FFC24B;
  --hb-muted:#93A0A9;
  --hb-dim:#6E7A83;
  --hb-ink:#180A05;
  --rail-w:88px;
  --r-lg:28px;
  --r-md:20px;
  --r-sm:12px;
  --shell:1280px;
  --font-ui:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"DIN Alternate","Roboto Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --t:.22s cubic-bezier(.4,0,.2,1);
}

/* ---- reset ---- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
  background:var(--hb-arena);
}
body{
  margin:0;
  min-height:100vh;
  color:var(--hb-cream);
  font-family:var(--font-ui);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding-left:var(--rail-w);
  padding-top:104px;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(820px 460px at 6% -8%, rgba(255,78,43,.17), transparent 62%),
    radial-gradient(760px 420px at 98% 4%, rgba(47,210,228,.13), transparent 66%),
    radial-gradient(900px 620px at 52% 112%, rgba(94,125,99,.14), transparent 70%),
    linear-gradient(180deg,#0B1014 0%,#0B1014 58%,#080C10 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.55;
  background-image:repeating-linear-gradient(115deg, rgba(42,52,60,.42) 0 1px, transparent 1px 72px);
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.75), transparent 72%);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.75), transparent 72%);
}
img,svg,video{max-width:100%;display:block}
ul,ol{padding:0}
button{font:inherit;color:inherit}
a{color:inherit}
:focus-visible{outline:2px solid var(--hb-cyan);outline-offset:3px;border-radius:8px}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---- 中文排版 ---- */
h1,h2,h3,h4{font-family:var(--font-ui);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin:0}
.display{font-size:clamp(44px,7vw,96px);font-weight:900;line-height:.96;letter-spacing:-.035em}
.h2{font-size:clamp(28px,3.4vw,44px);line-height:1.06;letter-spacing:-.025em}
.h3{font-size:clamp(20px,2vw,26px);line-height:1.2}
.h4{font-size:18px;line-height:1.3}
.lede{font-size:clamp(16px,1.3vw,18px);color:#C3CDD4;max-width:36em;margin:16px 0 0}
.prose{max-width:68ch;font-size:16.5px;line-height:1.78;color:#DCE3E8}
.prose p{margin:0 0 1.1em}
.prose strong{color:#fff;font-weight:700}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  padding:6px 13px;border-radius:999px;
  color:var(--hb-cyan);background:rgba(47,210,228,.09);
  border:1px solid rgba(47,210,228,.34);
}
.eyebrow--flare{color:#FFB6A2;background:rgba(255,78,43,.12);border-color:rgba(255,78,43,.42)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;
  color:#AEB9C1;background:rgba(255,255,255,.04);border:1px solid var(--hb-line);
  white-space:nowrap;
}
.tag--flare{color:#FFC0AF;background:rgba(255,78,43,.14);border-color:rgba(255,78,43,.48)}
.tag--cyan{color:#A6EEF6;background:rgba(47,210,228,.12);border-color:rgba(47,210,228,.44)}
.tag--moss{color:#C2D5C6;background:rgba(94,125,99,.2);border-color:rgba(94,125,99,.62)}
.tag--warn{color:#FFE2A8;background:rgba(255,194,75,.14);border-color:rgba(255,194,75,.5)}
.tag--clay{color:#EDBCA9;background:rgba(168,84,60,.22);border-color:rgba(168,84,60,.62)}

/* ---- 容器与区块 ---- */
.shell{width:min(var(--shell),100% - 48px);margin-inline:auto}
.shell--wide{width:min(1480px,100% - 48px);margin-inline:auto}
.section{padding:88px 0;position:relative}
.section--tight{padding:56px 0}
.section--panel{background:linear-gradient(180deg,rgba(22,30,36,.86),rgba(13,19,24,.6));border-block:1px solid var(--hb-line)}
.rule{height:1px;border:0;margin:0;background:var(--hb-line)}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  list-style:none;margin:0 0 22px;padding:0;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--hb-dim);
}
.crumbs li{display:inline-flex;align-items:center;gap:6px}
.crumbs li::after{content:"/";color:var(--hb-line)}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--hb-muted);text-decoration:none}
.crumbs a:hover{color:var(--hb-cyan)}
.crumbs [aria-current="page"]{color:var(--hb-cream)}

/* ---- 网格 ---- */
.grid{display:grid;gap:24px}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid transparent;border-radius:999px;
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1.2;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:transform var(--t),background var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.btn--flare{background:linear-gradient(135deg,var(--hb-flare),var(--hb-amber));color:var(--hb-ink)}
.btn--flare:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,78,43,.34)}
.btn--ghost{background:rgba(255,255,255,.03);border-color:var(--hb-line);color:var(--hb-cream)}
.btn--ghost:hover{border-color:var(--hb-cyan);color:var(--hb-cyan)}
.btn--cyan{background:linear-gradient(135deg,var(--hb-cyan),var(--hb-teal));color:#04191D}
.btn--cyan:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(47,210,228,.3)}

/* ---- 头部外壳 ---- */
.site-header{position:relative;z-index:80}
.skip-link{
  position:fixed;left:50%;top:-120px;transform:translateX(-50%);
  z-index:200;padding:10px 22px;border-radius:0 0 18px 18px;
  background:var(--hb-cream);color:#0B1014;font-weight:700;font-size:14px;text-decoration:none;
  transition:top var(--t);
}
.skip-link:focus{top:0}

.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);z-index:75;
  display:flex;flex-direction:column;align-items:center;gap:20px;
  padding:22px 0 24px;
  background:linear-gradient(180deg,#121A20 0%,#0D1318 46%,#101A1D 100%);
  border-right:1px solid var(--hb-line);
  overflow:hidden;
}
.rail::before{
  content:"";position:absolute;left:0;top:0;width:4px;height:38%;
  background:linear-gradient(180deg,var(--hb-flare),var(--hb-amber));
}
.rail::after{
  content:"";position:absolute;left:0;bottom:0;width:4px;height:28%;
  background:linear-gradient(180deg,var(--hb-cyan),var(--hb-teal));
}
.rail__brand{display:flex;flex-direction:column;align-items:center;gap:14px;text-decoration:none;color:inherit}
.rail__mark{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.04em;
  color:var(--hb-ink);background:linear-gradient(135deg,var(--hb-flare),var(--hb-amber));
  box-shadow:0 10px 26px rgba(255,78,43,.35);
}
.rail__name{
  writing-mode:vertical-rl;font-size:13px;font-weight:700;letter-spacing:.3em;color:var(--hb-cream);
}
.rail__ticks{
  list-style:none;margin:auto 0;padding:0;width:100%;
  display:flex;flex-direction:column;align-items:center;gap:16px;position:relative;
}
.rail__ticks::before{
  content:"";position:absolute;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,transparent,var(--hb-line) 12%,var(--hb-line) 88%,transparent);
}
.rail__ticks li{
  position:relative;padding:2px 6px;border-radius:6px;
  background:#0D1318;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.04em;color:var(--hb-muted);
}
.rail__ticks li:first-child{color:#FFB6A2}
.rail__ticks li:last-child{color:#A6EEF6}
.rail__note{
  margin:0;writing-mode:vertical-rl;font-family:var(--font-mono);
  font-size:10px;letter-spacing:.28em;text-transform:uppercase;color:var(--hb-moss);
}

.topbar{
  position:fixed;z-index:70;
  top:16px;left:calc(var(--rail-w) + 20px);right:20px;
  display:flex;align-items:center;gap:12px;
  padding:10px 12px 10px 16px;
  border-radius:999px;
  background:rgba(22,30,36,.84);
  border:1px solid var(--hb-line);
  box-shadow:0 16px 44px rgba(0,0,0,.45);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:top var(--t),padding var(--t),background var(--t);
}
html[data-scrolled="true"] .topbar{top:8px;padding:6px 10px 6px 14px;background:rgba(15,21,26,.95)}
.topbar__brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--hb-cream);white-space:nowrap}
.topbar__dot{
  width:10px;height:10px;border-radius:4px;background:var(--hb-flare);
  box-shadow:0 0 0 4px rgba(255,78,43,.16);
}
.topbar__label{font-size:15px;font-weight:800;letter-spacing:.01em;display:block;line-height:1.15}
.topbar__sub{
  display:block;font-style:normal;font-family:var(--font-mono);font-size:9.5px;
  font-weight:600;letter-spacing:.2em;color:var(--hb-cyan);
}
.topbar__div{width:1px;height:26px;background:var(--hb-line);flex:0 0 auto}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav ul{
  display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;
  overflow-x:auto;scrollbar-width:none;
}
.site-nav ul::-webkit-scrollbar{display:none}
.site-nav a{
  display:block;padding:9px 14px;border-radius:999px;
  font-size:14px;font-weight:600;color:#B9C4CC;text-decoration:none;white-space:nowrap;
  transition:color var(--t),background var(--t),box-shadow var(--t);
}
.site-nav a:hover{color:var(--hb-cream);background:rgba(255,255,255,.06)}
.site-nav a[aria-current="page"]{
  color:var(--hb-ink);
  background:linear-gradient(135deg,var(--hb-flare),var(--hb-amber));
  font-weight:700;box-shadow:0 6px 18px rgba(255,78,43,.3);
}
.topbar__tools{margin-left:auto;display:flex;align-items:center;gap:6px;flex:0 0 auto}
.link-ghost{
  padding:8px 12px;border-radius:999px;font-size:13px;font-weight:600;
  color:#B9C4CC;text-decoration:none;white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.link-ghost:hover{color:var(--hb-cyan);background:rgba(47,210,228,.1)}
.nav-toggle{
  display:none;place-items:center;flex:0 0 auto;
  width:46px;height:46px;padding:0;border-radius:16px;
  border:1px solid var(--hb-line);background:rgba(255,255,255,.04);cursor:pointer;
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--hb-cream);transition:background var(--t)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;
  background:var(--hb-cream);transition:transform var(--t),background var(--t);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);background:var(--hb-flare)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--hb-flare)}
.scroll-progress{
  position:fixed;left:0;top:0;z-index:120;height:3px;width:0;pointer-events:none;
  background:linear-gradient(90deg,var(--hb-flare),var(--hb-amber) 45%,var(--hb-cyan));
  transition:width .1s linear;
}

/* ---- 通用内容组件 ---- */
.panel{
  background:linear-gradient(160deg,#161E24,#111820);
  border:1px solid var(--hb-line);border-radius:var(--r-lg);padding:28px;
}
.panel--flare{box-shadow:inset 0 0 0 1px rgba(255,78,43,.22);border-color:rgba(255,78,43,.35)}
.panel--cyan{box-shadow:inset 0 0 0 1px rgba(47,210,228,.2);border-color:rgba(47,210,228,.32)}
.card{
  background:#161E24;border:1px solid var(--hb-line);border-radius:24px;padding:22px;
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-3px);border-color:rgba(255,78,43,.5);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(32px,4vw,56px);font-weight:700;line-height:1;letter-spacing:-.02em;
}
.stat__num--flare{color:var(--hb-flare)}
.stat__num--cyan{color:var(--hb-cyan)}
.stat__num--moss{color:#9DBAA3}
.stat__label{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--hb-muted);
}
.sidenote{
  border-left:2px solid var(--hb-cyan);padding:4px 0 4px 16px;
  font-size:14px;line-height:1.7;color:#B7C2CA;max-width:30ch;
}
.line-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--hb-line)}
.line-list li{
  position:relative;display:flex;align-items:center;gap:18px;
  padding:18px 22px 18px 20px;border-bottom:1px solid var(--hb-line);
  transition:transform var(--t),background var(--t);
}
.line-list li::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:transparent;transition:background var(--t);
}
.line-list li:hover{transform:translateX(8px);background:rgba(255,255,255,.03)}
.line-list li:hover::before{background:var(--hb-flare)}
.line-list__idx{
  flex:0 0 auto;min-width:2.6em;font-family:var(--font-mono);
  font-size:13px;font-weight:600;color:var(--hb-clay);
}
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--hb-line)}
.data-table th{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--hb-muted);white-space:nowrap;
}
.data-table td.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.data-table tbody tr{transition:background var(--t)}
.data-table tbody tr:hover{background:rgba(255,255,255,.035)}
.toc{position:sticky;top:120px;font-size:13px;padding-left:16px;border-left:2px solid var(--hb-line)}
.toc ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.toc a{
  position:relative;display:block;padding-left:2px;text-decoration:none;
  color:var(--hb-muted);transition:color var(--t);
}
.toc a:hover{color:var(--hb-cream)}
.toc a[aria-current="true"]{color:var(--hb-flare);font-weight:700}
.toc a[aria-current="true"]::before{
  content:"";position:absolute;left:-18px;top:3px;bottom:3px;width:2px;background:var(--hb-flare);
}

/* ---- 媒体容器（供页面阶段放占位图） ---- */
.media{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--hb-line);
  background:linear-gradient(150deg,#1B242B,#111820 70%,#0D1418);
}
.media img,.media video{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--21x9{aspect-ratio:21/9}
.media--tilt{-webkit-clip-path:polygon(0 0,100% 0,100% 88%,0 100%);clip-path:polygon(0 0,100% 0,100% 88%,0 100%)}
.media__tag{position:absolute;left:16px;top:16px;z-index:2}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:18px 18px 14px;font-size:12.5px;color:#C3CDD4;
  background:linear-gradient(180deg,transparent,rgba(8,12,16,.9));
}

/* ---- 显现与回到顶部 ---- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.reveal[data-shown="true"]{opacity:1;transform:none}
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:60;
  width:52px;height:52px;display:grid;place-items:center;
  border-radius:18px;border:1px solid var(--hb-line);cursor:pointer;
  background:rgba(22,30,36,.92);color:var(--hb-cream);font-size:18px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),border-color var(--t),color var(--t);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--hb-flare);color:var(--hb-flare)}

/* ---- 页脚 ---- */
.site-footer{
  position:relative;margin-top:96px;overflow:hidden;
  border-top:1px solid var(--hb-line);
  background:linear-gradient(180deg,#0D1318 0%,#0B1014 52%,#070A0D 100%);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;opacity:.9;
  background:linear-gradient(90deg,var(--hb-flare) 0%,var(--hb-amber) 26%,var(--hb-moss) 52%,var(--hb-cyan) 78%,var(--hb-teal) 100%);
}
.footer__glow{
  position:absolute;right:-140px;top:-180px;width:540px;height:540px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,210,228,.15),transparent 66%);
  pointer-events:none;
}
.footer__inner{
  position:relative;width:min(var(--shell),100% - 48px);margin-inline:auto;
  padding:74px 0 44px;display:grid;grid-template-columns:minmax(280px,1.05fr) 2.5fr;gap:52px;
}
.footer__brand{margin:0 0 12px;font-size:26px;font-weight:900;letter-spacing:-.02em}
.footer__brand span{color:var(--hb-flare)}
.footer__summary{margin:0 0 22px;font-size:15px;color:#A9B5BD;max-width:32em}
.footer__tagline{
  margin:18px 0 0;font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--hb-moss);
}
.footer__cols{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.footer__col h2{
  margin:0 0 14px;font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;color:var(--hb-cyan);
}
.footer__col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer__col a{
  font-size:14px;color:#B4C0C8;text-decoration:none;
  transition:color var(--t),transform var(--t);display:inline-block;
}
.footer__col a:hover{color:var(--hb-cream);transform:translateX(4px)}
.footer__meta{position:relative;border-top:1px solid var(--hb-line)}
.footer__meta-inner{
  width:min(var(--shell),100% - 48px);margin-inline:auto;
  padding:26px 0 18px;display:flex;flex-wrap:wrap;gap:14px 28px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:#8E9AA3;
}
.footer__contact{display:flex;flex-wrap:wrap;gap:8px 22px}
.footer__contact span{display:inline-flex;align-items:baseline;gap:8px}
.footer__contact b{
  font-family:var(--font-mono);font-size:10px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--hb-muted);
}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em}
.footer__note{
  width:min(var(--shell),100% - 48px);margin:0 auto;
  padding:0 0 44px;font-size:12px;line-height:1.75;color:#77838C;
}

/* ---- 平板 ---- */
@media (max-width:1150px){
  .topbar__sub{display:none}
  .footer__inner{grid-template-columns:1fr;gap:40px;padding-top:60px}
}

/* ---- 移动端 ---- */
@media (max-width:1023px){
  body{padding-left:0;padding-top:88px}
  .rail{display:none}
  .topbar{
    left:12px;right:12px;top:12px;
    padding:8px 8px 8px 14px;border-radius:22px;
  }
  html[data-scrolled="true"] .topbar{top:8px}
  .topbar__brand{display:flex}
  .topbar__div{display:none}
  .topbar__tools{display:none}
  .nav-toggle{display:grid;margin-left:auto}
  .site-nav{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    display:none;padding:10px;border-radius:24px;
    background:rgba(13,19,24,.98);border:1px solid var(--hb-line);
    box-shadow:0 30px 70px rgba(0,0,0,.66);
    max-height:calc(100vh - 130px);overflow-y:auto;
  }
  .site-nav[data-open]{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:4px;overflow:visible}
  .site-nav a{padding:13px 16px;border-radius:16px;font-size:15px}
  .section{padding:56px 0}
  .section--tight{padding:40px 0}
  .grid--7-5,.grid--8-4,.grid--5-7{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:repeat(2,1fr)}
  .footer__inner{padding:52px 0 32px}
  .footer__meta-inner{flex-direction:column;align-items:flex-start;padding-bottom:14px}
  .shell,.shell--wide{width:calc(100% - 32px)}
  .footer__inner,.footer__meta-inner,.footer__note{width:calc(100% - 32px)}
  .toc{position:static;border-left:0;padding-left:0;border-top:1px solid var(--hb-line);padding-top:16px}
}

@media (max-width:560px){
  .footer__cols{grid-template-columns:1fr;gap:22px}
  .to-top{right:16px;bottom:16px;width:46px;height:46px;border-radius:16px}
  .display{font-size:clamp(38px,11vw,60px)}
}

/* ---- 动效与可访问性 ---- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{opacity:1;transform:none}
  .scroll-progress{transition:none}
}