/* ===========================================================
   YABO 赛场 — shared site kit
   /assets/site.css
   夜间赛场指挥台：深墨绿底 / 玻璃层 / 8 度斜切 / Bento 网格
   =========================================================== */

/* ---------- 0. tokens ---------- */
:root{
  --ink-0:#05100E;
  --ink-1:#0A1614;
  --glass:#12241F;
  --blue:#2F6BFF;
  --cyan:#35F2D6;
  --orange:#FF6A1A;
  --white:#EAF6F3;
  --muted:#8CA6A0;
  --line:#25403A;
  --red:#FF4F6E;
  --dim:#5C7570;

  --font-display:"Oswald","Barlow Condensed","PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:Inter,"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;

  --page-max:1240px;
  --gutter:clamp(16px,4vw,40px);
  --hdr-h:72px;
  --hdr-h-sm:56px;
  --radius:14px;
  --cut:8deg;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--hdr-h) + 14px);
}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
b,strong{font-weight:700}
[hidden]{display:none!important}

/* ---------- 2. base ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--white);
  background-color:var(--ink-0);
  background-image:
    radial-gradient(120% 90% at 90% -12%, rgba(47,107,255,.20), transparent 62%),
    radial-gradient(80% 62% at 6% 2%, rgba(53,242,214,.09), transparent 58%),
    linear-gradient(172deg,#071512 0%,#05100E 44%,#030A09 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.08;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(32px,5vw,56px)}
h2{font-size:clamp(24px,3.2vw,36px)}
h3{font-size:clamp(19px,2.2vw,24px)}
h4{font-size:18px}
p{text-wrap:pretty}

::selection{background:rgba(53,242,214,.28);color:#03110E}

/* ---------- 3. a11y ---------- */
:where(a,button,summary,[tabindex],input,select,textarea):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:999;
  padding:11px 20px;
  border-radius:8px;
  background:var(--cyan);
  color:#03110E;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 4. layout utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.prose{max-width:720px}
.prose p + p{margin-top:1em}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:18px;height:1px;
  background:var(--cyan);
}

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

.grid{display:grid;gap:16px}
.grid-bento{display:grid;grid-template-columns:1fr;gap:16px}

@media (min-width:860px){
  .grid-bento{grid-template-columns:repeat(12,1fr)}
  .span-3{grid-column:span 3}
  .span-4{grid-column:span 4}
  .span-6{grid-column:span 6}
  .span-8{grid-column:span 8}
  .span-12{grid-column:span 12}
}

.skew-cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 28px),calc(100% - 28px) 100%,0 100%);
}

/* ---------- 5. buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  letter-spacing:.05em;
  line-height:1;
  white-space:nowrap;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),transform .2s var(--ease),
             box-shadow .2s var(--ease);
}
.btn-primary{
  background:var(--blue);
  color:#fff;
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 12px 32px -14px rgba(47,107,255,.95);
}
.btn-primary:hover{background:#3f79ff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:rgba(18,36,31,.6);
  border-color:var(--line);
  color:var(--white);
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 6. breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--muted);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li:not(:last-child)::after{content:"›";color:var(--line)}
.crumbs a{transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--white)}

/* ---------- 7. panels ---------- */
.panel{
  position:relative;
  padding:clamp(16px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--ink-1);
}
.panel--glass{
  background:linear-gradient(158deg,rgba(18,36,31,.86),rgba(10,22,20,.55));
  border-color:rgba(37,64,58,.9);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
}
.panel--edge::before{
  content:"";
  position:absolute;
  inset:0 auto auto 0;
  width:64px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),transparent);
}

/* ---------- 8. media frame (image base) ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background-color:var(--ink-1);
  background-image:
    radial-gradient(120% 120% at 18% 0%,rgba(47,107,255,.20),transparent 62%),
    linear-gradient(158deg,#0C1B18,#061110);
  isolation:isolate;
}
.media-frame img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:36%;
  background:linear-gradient(180deg,transparent,rgba(3,10,9,.82));
  pointer-events:none;
  z-index:1;
}
.media-ph{
  display:grid;
  place-items:center;
  width:100%;height:100%;
  min-height:120px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:#48625C;
}
.ar-wide{aspect-ratio:16/9}
.ar-photo{aspect-ratio:4/3}
.ar-square{aspect-ratio:1/1}
.ar-tall{aspect-ratio:3/4}

/* ===========================================================
   9. HEADER — 紧凑命令栏
   =========================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg,rgba(5,16,14,.94),rgba(5,16,14,.74));
  border-bottom:1px solid rgba(37,64,58,.78);
  -webkit-backdrop-filter:blur(10px) saturate(1.15);
  backdrop-filter:blur(10px) saturate(1.15);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.site-header[data-stuck="true"]{
  background:rgba(6,20,17,.84);
  border-bottom-color:rgba(47,107,255,.36);
}

.hdr-shell{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,24px);
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--hdr-h);
  transition:min-height .3s var(--ease);
}
.site-header[data-stuck="true"] .hdr-shell{min-height:var(--hdr-h-sm)}

/* brand */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:4px 2px;
}
.brand-mark{display:grid;gap:3px;width:20px}
.brand-mark-bar{
  display:block;
  height:3px;
  border-radius:2px;
  background:var(--cyan);
}
.brand-mark-bar:nth-child(1){width:100%;background:var(--blue)}
.brand-mark-bar:nth-child(2){width:72%}
.brand-mark-bar:nth-child(3){width:44%;background:var(--orange)}
.brand-text{display:flex;align-items:baseline;gap:6px}
.brand-name{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1;
  color:var(--white);
}
.brand-sub{
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.3em;
  line-height:1;
  color:var(--cyan);
}

/* toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 13px;
  border:1px solid var(--line);
  border-radius:10px;
  background:rgba(18,36,31,.62);
  color:var(--white);
  font-family:var(--font-display);
  font-size:13px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* nav */
.primary-nav{
  display:flex;
  align-items:center;
  flex:1 1 auto;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 12px;
  border-radius:8px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-list a:hover{color:var(--white);background:rgba(53,242,214,.08)}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--line);
  transition:color .18s var(--ease);
}
.nav-list a:hover .nav-idx{color:var(--cyan)}
.nav-list a[aria-current="page"]{
  color:var(--white);
  background:rgba(47,107,255,.16);
}
.nav-list a[aria-current="page"] .nav-idx{color:var(--cyan)}
.nav-list a[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:-1px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}

/* drawer foot (mobile only) */
.nav-drawer-foot{display:none}
.nav-drawer-title{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--dim);
  margin-bottom:10px;
}
.quick-links{display:flex;flex-wrap:wrap;gap:8px}
.quick-links a{
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:13px;
  color:var(--white);
  background:rgba(18,36,31,.72);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.quick-links a:hover{border-color:var(--cyan);color:var(--cyan)}

/* tools */
.hdr-tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  margin-left:auto;
}
.week-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
  white-space:nowrap;
}
.week-chip b{
  color:var(--cyan);
  font-weight:600;
}
.week-chip-dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--orange);
  animation:week-ping 2.6s var(--ease) infinite;
}
@keyframes week-ping{
  0%{box-shadow:0 0 0 0 rgba(255,106,26,.6)}
  70%{box-shadow:0 0 0 7px rgba(255,106,26,0)}
  100%{box-shadow:0 0 0 0 rgba(255,106,26,0)}
}

/* scroll progress */
.hdr-progress{
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue),var(--cyan) 55%,var(--orange));
  pointer-events:none;
}

/* ---------- 9b. header responsive ---------- */
@media (max-width:1080px){
  :root{--hdr-h:60px}

  .brand{flex:1 1 auto}
  .nav-toggle{display:inline-flex;order:2}
  .hdr-tools{order:3;margin-left:0;gap:8px}
  .week-chip{display:none}
  .hdr-tools .btn{padding:9px 15px;font-size:13px;letter-spacing:.03em}

  .primary-nav{
    position:absolute;
    top:100%;left:0;right:0;
    display:block;
    flex:none;
    z-index:110;
    padding:16px var(--gutter) 26px;
    max-height:calc(100dvh - var(--hdr-h));
    overflow-y:auto;
    background:rgba(6,20,17,.975);
    border-bottom:1px solid rgba(47,107,255,.32);
    box-shadow:0 34px 64px -22px #000;
    -webkit-backdrop-filter:blur(18px) saturate(1.2);
    backdrop-filter:blur(18px) saturate(1.2);
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }

  .nav-list{flex-direction:column;align-items:stretch;gap:4px}
  .nav-list a{
    padding:14px 12px;
    border:1px solid transparent;
    border-radius:10px;
    font-size:16px;
    color:var(--muted);
  }
  .nav-list a[aria-current="page"]{
    border-color:rgba(47,107,255,.5);
    background:linear-gradient(180deg,rgba(47,107,255,.24),rgba(47,107,255,.06));
  }
  .nav-list a[aria-current="page"]::after{display:none}
  .nav-idx{font-size:11px;width:22px}

  .nav-drawer-foot{
    display:block;
    margin-top:18px;
    padding-top:16px;
    border-top:1px dashed rgba(37,64,58,.9);
  }

  body.nav-open{overflow:hidden}
}

@media (max-width:420px){
  .brand-name{font-size:20px}
  .brand-sub{font-size:12px;letter-spacing:.22em}
  .hdr-tools .btn{padding:8px 12px;font-size:12px}
}

/* ===========================================================
   10. FOOTER — 四区递降
   =========================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,112px);
  padding-top:clamp(36px,5vw,64px);
  color:var(--muted);
  font-size:14px;
  background:linear-gradient(180deg,rgba(5,16,14,.35) 0%,#030B0A 34%,#020807 100%);
  border-top:1px solid rgba(37,64,58,.82);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,214,.55),rgba(47,107,255,.6),transparent);
}

.ftr-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(24px,4vw,48px);
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
@media (min-width:720px){
  .ftr-grid{grid-template-columns:1.3fr 1fr}
}
@media (min-width:1080px){
  .ftr-grid{grid-template-columns:1.45fr .85fr .95fr 1.15fr}
}

.ftr-title{
  font-family:var(--font-display);
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}

/* brand block */
.ftr-brand .brand{margin-bottom:16px}
.ftr-tag{
  max-width:34ch;
  color:var(--muted);
  font-size:14px;
  line-height:1.75;
}
.cert-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  padding:7px 13px;
  border:1px solid rgba(53,242,214,.34);
  border-radius:8px;
  background:rgba(53,242,214,.07);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cyan);
}
.cert-badge::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
}

/* link columns */
.ftr-links{display:grid;gap:11px}
.ftr-links a{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:14px;
  color:var(--muted);
  transition:color .18s var(--ease);
}
.ftr-links a::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:1px;
  background:var(--line);
  transition:width .2s var(--ease),background .2s var(--ease);
}
.ftr-links a:hover{color:var(--white)}
.ftr-links a:hover::before{width:15px;background:var(--cyan)}

/* contact */
.ftr-contact-list{display:grid;gap:12px;font-size:13.5px;line-height:1.6;color:var(--white)}
.ftr-key{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--dim);
  margin-bottom:2px;
}
.ftr-contact-note{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.72;
  color:var(--dim);
}

/* low-key rail */
.ftr-rail{
  margin-top:clamp(28px,4vw,48px);
  border-top:1px solid rgba(37,64,58,.62);
  background:rgba(2,8,7,.72);
}
.ftr-rail-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding:14px var(--gutter);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--dim);
}
.ftr-rail a{
  color:#71908A;
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:rgba(113,144,138,.35);
  transition:color .18s var(--ease);
}
.ftr-rail a:hover{color:var(--cyan)}
.ftr-rail-end{margin-left:auto}

@media (max-width:719px){
  .ftr-rail-end{margin-left:0;width:100%}
}

/* ===========================================================
   11. 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;
    scroll-behavior:auto!important;
  }
  .week-chip-dot{animation:none}
}