/* ============================================================
   /assets/site.css — 热竞技赛场 全站共享样式
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- tokens ---------- */
:root{
  --night:#0B1230;
  --panel:#18234F;
  --cream:#F4EDDD;
  --paper:#E9DCC3;
  --ink:#2A1B14;
  --mist:#F8F6F0;
  --signal:#FF6A2A;
  --signal-soft:#FF8347;
  --signal-ink:#1A0F08;
  --flame:#D6402F;
  --vblue:#2E7DD1;
  --vgreen:#2F8F6B;
  --vyellow:#F2C14E;

  --hairline:rgba(248,246,240,.14);
  --hairline-strong:rgba(248,246,240,.30);
  --hairline-ink:rgba(42,27,20,.14);
  --hairline-ink-strong:rgba(42,27,20,.28);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;

  --shell:1220px;
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --pill:999px;
  --ease:cubic-bezier(.22,1,.36,1);
  --shadow:0 22px 48px -28px rgba(11,18,48,.55);
}

/* ---------- base typography ---------- */
body{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.7;
  color:var(--ink);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.01em;
  text-wrap:balance;
}
h1{font-size:clamp(2.1rem,4.4vw,3.4rem)}
h2{font-size:clamp(1.6rem,3vw,2.4rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.45rem)}
p{text-wrap:pretty}
small{font-size:.8125rem;line-height:1.55}
strong{font-weight:700}

:focus-visible{outline:3px solid var(--vblue);outline-offset:3px;border-radius:4px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--vyellow)}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.tilt{display:inline-block;transform:skewX(-2deg)}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:16px;top:-72px;z-index:200;
  display:inline-flex;align-items:center;
  padding:12px 20px;
  border-radius:0 0 var(--r-md) var(--r-md);
  background:var(--signal);color:var(--signal-ink);
  font-weight:700;font-size:.9rem;text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- layout primitives ---------- */
.container{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.section{padding-block:clamp(44px,7vw,92px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}
.section--cream{background:var(--cream);color:var(--ink)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--panel{background:var(--panel);color:var(--mist)}
.section--night{background:var(--night);color:var(--mist)}
.section--night h1,.section--night h2,.section--night h3,
.section--panel h1,.section--panel h2,.section--panel h3{color:var(--mist)}

.split{
  display:grid;gap:clamp(24px,4vw,56px);
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
}
.split__aside{min-width:0}
.split__main{min-width:0}
.grid-auto{
  display:grid;gap:clamp(16px,2.4vw,28px);
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}
.rule{height:0;border:0;border-top:1px solid var(--hairline-ink);margin-block:clamp(20px,3vw,32px)}
.rule--light{border-top-color:var(--hairline)}

/* ---------- text components ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;
  font-weight:500;color:var(--flame);
}
.eyebrow::before{
  content:"";width:16px;height:2px;background:currentColor;
  transform:skewX(-20deg);flex:none;
}
.display-title{
  font-family:var(--font-display);
  font-size:clamp(2.6rem,6vw,5.4rem);
  font-weight:900;line-height:1.05;letter-spacing:-.02em;
}
.lede{
  font-size:clamp(1.05rem,1.6vw,1.25rem);
  line-height:1.65;color:rgba(42,27,20,.78);max-width:62ch;
}
.section--night .lede,.section--panel .lede{color:rgba(248,246,240,.78)}
.prose{max-width:68ch}
.prose > * + *{margin-top:1.05em}
.prose p{margin:0 0 1.05em}
.prose h2{margin-top:1.9em}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1.05em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{color:var(--flame);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{
  margin:1.4em 0;padding:.2em 0 .2em 1.2em;
  border-left:3px solid var(--signal);
  font-family:var(--font-display);font-size:1.1rem;
}

/* ---------- buttons / chips / tags ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.45em;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-family:var(--font-body);font-size:.95rem;font-weight:600;
  line-height:1.2;text-decoration:none;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--signal);color:var(--signal-ink)}
.btn--primary:hover{background:var(--signal-soft)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--hairline-ink-strong)}
.btn--ghost:hover{background:rgba(42,27,20,.07);border-color:var(--ink)}
.btn--light{background:transparent;color:var(--mist);border-color:var(--hairline-strong)}
.btn--light:hover{background:rgba(248,246,240,.10);border-color:var(--mist)}
.btn--quiet{background:var(--panel);color:var(--mist)}
.btn--quiet:hover{background:#1f2c60}

.chip{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.42em .95em;
  border-radius:var(--pill);
  border:1px solid var(--hairline-ink-strong);
  background:transparent;color:var(--ink);
  font-size:.8rem;font-weight:500;letter-spacing:.03em;
  text-decoration:none;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.chip:hover{border-color:var(--ink)}
.chip[aria-pressed="true"],.chip.is-active{
  background:var(--night);color:var(--mist);border-color:var(--night);
}
.tag{
  display:inline-flex;align-items:center;gap:.4em;
  font-family:var(--font-body);
  font-size:.68rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--panel);
}
.section--night .tag,.section--panel .tag{color:rgba(248,246,240,.72)}
.status-dot{
  width:.5em;height:.5em;border-radius:50%;flex:none;
  background:var(--vgreen);
  box-shadow:0 0 0 3px rgba(47,143,107,.18);
}
.status-dot[data-state="live"]{background:var(--flame);box-shadow:0 0 0 3px rgba(214,64,47,.2)}
.status-dot[data-state="hot"]{background:var(--signal);box-shadow:0 0 0 3px rgba(255,106,42,.22)}
.status-dot[data-state="done"]{background:var(--vgreen)}
.status-dot[data-state="open"]{background:var(--vblue);box-shadow:0 0 0 3px rgba(46,125,209,.2)}
.status-dot[data-state="note"]{background:var(--vyellow);box-shadow:0 0 0 3px rgba(242,193,78,.24)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.55em;
  font-size:.8rem;letter-spacing:.05em;color:rgba(42,27,20,.62);
  margin-bottom:clamp(18px,3vw,30px);
}
.breadcrumbs li{display:inline-flex;align-items:center;gap:.55em}
.breadcrumbs li + li::before{content:"/";color:rgba(42,27,20,.32)}
.breadcrumb-link{text-decoration:none;border-bottom:1px solid var(--hairline-ink);transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb-link:hover{color:var(--flame);border-color:var(--flame)}
.breadcrumb-current{color:var(--ink);font-weight:600}
.section--night .breadcrumbs,.section--panel .breadcrumbs{color:rgba(248,246,240,.66)}
.section--night .breadcrumb-current,.section--panel .breadcrumb-current{color:var(--mist)}
.section--night .breadcrumb-link,.section--panel .breadcrumb-link{border-bottom-color:var(--hairline-strong)}

/* ---------- cards ---------- */
.card{
  background:var(--cream);
  border:1px solid var(--hairline-ink);
  border-radius:var(--r-lg);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--shadow);
}
.card__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.7em;
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  color:rgba(42,27,20,.60);margin-bottom:.6em;
}

/* ---------- figure / image container ---------- */
.figure{margin:0;display:grid;gap:.75rem}
.figure__img{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  aspect-ratio:16/9;
  background:
    linear-gradient(160deg,var(--panel) 0%,var(--night) 58%,#080e24 100%);
  isolation:isolate;
}
.figure__img > img{
  width:100%;height:100%;object-fit:cover;
  border-radius:inherit;
}
.figure__img::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 90% at 18% 0%,rgba(255,106,42,.20),transparent 56%),
    radial-gradient(90% 80% at 100% 100%,rgba(46,125,209,.22),transparent 60%);
}
.figure__caption{
  font-size:.8rem;line-height:1.55;color:rgba(42,27,20,.66);
  padding-left:.15rem;
}
.figure--on-dark .figure__caption{color:rgba(248,246,240,.70)}
.figure--wide .figure__img{aspect-ratio:21/9}

/* ---------- reveal ---------- */
[data-reveal].is-reveal-ready{
  opacity:0;transform:translateY(18px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  will-change:opacity,transform;
}
[data-reveal][data-reveal-delay="1"]{transition-delay:70ms}
[data-reveal][data-reveal-delay="2"]{transition-delay:140ms}
[data-reveal][data-reveal-delay="3"]{transition-delay:210ms}
[data-reveal][data-reveal-delay="4"]{transition-delay:280ms}
[data-reveal][data-reveal-delay="5"]{transition-delay:350ms}
[data-reveal][data-reveal-delay="6"]{transition-delay:420ms}
[data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--night);
  background-image:
    radial-gradient(120% 160% at 8% -30%,rgba(46,125,209,.30),transparent 58%),
    radial-gradient(90% 120% at 96% 0%,rgba(214,64,47,.16),transparent 62%);
  color:var(--mist);
  border-bottom:1px solid var(--hairline);
}
.site-header::after{
  content:"";display:block;height:9px;
  background:
    repeating-linear-gradient(90deg,rgba(248,246,240,.26) 0 1px,transparent 1px 16px) left top/100% 4px no-repeat,
    repeating-linear-gradient(90deg,rgba(248,246,240,.11) 0 1px,transparent 1px 8px) left bottom/100% 3px no-repeat;
}
.scroll-progress{
  position:absolute;left:0;right:0;top:0;height:2px;z-index:3;
  background:linear-gradient(90deg,var(--signal) 0%,var(--vyellow) 100%);
  transform:scaleX(0);transform-origin:0 50%;
  will-change:transform;pointer-events:none;
}
.header-inner{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.header-upper{
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(12px,3vw,32px);flex-wrap:wrap;
  padding-block:18px 14px;
}
.brand{
  display:flex;flex-direction:column;gap:3px;
  text-decoration:none;color:inherit;min-width:0;
}
.brand-mark{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(1.35rem,2.4vw,1.9rem);
  font-weight:900;line-height:1.05;letter-spacing:.01em;
  transform:skewX(-2deg);transform-origin:left bottom;
  color:var(--mist);
}
.brand-support{
  font-size:.72rem;line-height:1.5;letter-spacing:.14em;
  color:rgba(248,246,240,.62);
}
.header-tools{
  display:flex;align-items:center;gap:clamp(10px,2vw,20px);flex-wrap:wrap;
}
.version-badge{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:var(--pill);
  border:1px solid rgba(242,193,78,.52);
  background:rgba(242,193,78,.10);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--vyellow);white-space:nowrap;
}
.utility-nav{display:flex;align-items:center;gap:16px}
.utility-link{
  font-size:.82rem;letter-spacing:.03em;
  color:rgba(248,246,240,.80);text-decoration:none;
  padding-block:4px;border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.utility-link:hover{color:var(--signal);border-bottom-color:var(--signal)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 15px;border-radius:var(--pill);
  border:1px solid var(--hairline-strong);
  background:rgba(248,246,240,.04);
  color:var(--mist);font-size:.8rem;font-weight:600;letter-spacing:.06em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--mist)}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--signal);color:var(--signal);background:rgba(255,106,42,.10);
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:15px;flex:none}
.nav-toggle-bars span{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-text{white-space:nowrap}

.header-lower{
  display:flex;align-items:center;gap:clamp(12px,2vw,26px);
  padding-block:10px 12px;
  border-top:1px solid var(--hairline);
}
.nav-axis-label{
  font-family:var(--font-mono);font-size:.66rem;
  letter-spacing:.2em;text-transform:uppercase;
  color:rgba(248,246,240,.46);
  white-space:nowrap;flex:none;
  padding-right:clamp(12px,2vw,22px);
  border-right:1px solid var(--hairline);
}
.primary-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;
  padding:.5rem .92rem;
  border-radius:var(--pill);
  font-size:.88rem;font-weight:500;letter-spacing:.02em;
  color:rgba(248,246,240,.86);text-decoration:none;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-link:hover{background:rgba(248,246,240,.09);color:var(--mist)}
.nav-link[aria-current="page"]{
  background:var(--signal);color:var(--signal-ink);font-weight:700;
}
.nav-link[aria-current="page"]:hover{background:var(--signal-soft);color:var(--signal-ink)}

@keyframes nav-in{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--night);
  background-image:
    radial-gradient(110% 140% at 88% 0%,rgba(46,125,209,.24),transparent 60%),
    radial-gradient(80% 120% at 4% 100%,rgba(214,64,47,.14),transparent 62%);
  color:var(--mist);
}
.footer-flags{
  display:grid;grid-template-columns:repeat(5,1fr);
  height:6px;
}
.footer-flags span{display:block;height:100%}
.footer-flags span:nth-child(1){background:var(--vblue)}
.footer-flags span:nth-child(2){background:rgba(248,246,240,.9)}
.footer-flags span:nth-child(3){background:var(--flame)}
.footer-flags span:nth-child(4){background:var(--vgreen)}
.footer-flags span:nth-child(5){background:var(--vyellow)}
.footer-inner{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(34px,5vw,64px) clamp(16px,4vw,40px) clamp(18px,3vw,30px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1.7fr) minmax(0,1.1fr);
  gap:clamp(26px,4vw,58px);
  align-items:start;
}
.footer-brand-mark{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(1.3rem,2.2vw,1.7rem);
  font-weight:900;letter-spacing:.01em;
  transform:skewX(-2deg);transform-origin:left bottom;
  color:var(--mist);text-decoration:none;
  margin-bottom:.7rem;
}
.footer-summary{
  font-size:.88rem;line-height:1.75;
  color:rgba(248,246,240,.72);
  max-width:34ch;
}
.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.6em;
  margin-top:1.1rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
  color:rgba(248,246,240,.55);
}
.footer-meta-key{
  padding:2px 8px;border-radius:var(--pill);
  border:1px solid var(--hairline);
  color:rgba(248,246,240,.62);
}
.footer-columns{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-body);
  font-size:.7rem;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--vyellow);
  margin-bottom:.9rem;
}
.footer-links{display:grid;gap:.55rem}
.footer-link{
  display:inline-block;
  font-size:.86rem;line-height:1.5;
  color:rgba(248,246,240,.78);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:var(--signal);border-bottom-color:var(--signal)}
.footer-contact{min-width:0}
.footer-contact-list{display:grid;gap:.7rem}
.footer-contact-item{display:grid;gap:2px}
.footer-contact-key{
  font-family:var(--font-mono);font-size:.66rem;
  letter-spacing:.16em;text-transform:uppercase;
  color:rgba(248,246,240,.46);
}
.footer-contact-val{
  font-size:.86rem;line-height:1.6;
  color:rgba(248,246,240,.84);
  overflow-wrap:anywhere;
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px 24px;flex-wrap:wrap;
  margin-top:clamp(28px,4vw,48px);
  padding-top:clamp(16px,2vw,22px);
  border-top:1px solid var(--hairline);
}
.footer-legal{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em;
  color:rgba(248,246,240,.62);
}
.footer-copy{
  font-size:.74rem;letter-spacing:.04em;
  color:rgba(248,246,240,.52);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:980px){
  .split{grid-template-columns:minmax(0,1fr)}

  .nav-toggle{display:inline-flex}
  .header-lower{flex-direction:column;align-items:stretch;gap:0}
  .nav-axis-label{display:none;border:0;padding:0}
  .primary-nav{display:none;width:100%}
  .primary-nav[data-open="true"]{
    display:block;
    animation:nav-in .28s var(--ease) both;
    max-height:calc(100vh - 150px);
    overflow-y:auto;
    overscroll-behavior:contain;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;padding-bottom:14px}
  .nav-link{
    display:block;border-radius:var(--r-sm);
    padding:.78rem 1rem;font-size:.92rem;
  }

  .footer-top{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
  .footer-summary{max-width:52ch}
}

@media (max-width:640px){
  .header-upper{padding-block:14px 12px}
  .header-tools{gap:10px}
  .utility-nav{display:none}
  .brand-support{display:none}
  .version-badge{font-size:.66rem;padding:3px 9px}

  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .figure__img{aspect-ratio:4/3}
  .figure--wide .figure__img{aspect-ratio:16/9}
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    transition-delay:0ms!important;
  }
  [data-reveal].is-reveal-ready{opacity:1;transform:none}
  .scroll-progress{transition:none}
}