/* =========================================================
   /assets/site.css — 百灵牛牛电玩 共享外壳
   1 reset · 2 tokens · 3 base · 4 layout · 5 components
   6 header · 7 footer · 8 responsive · 9 a11y
   ========================================================= */

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

/* ---------- 2. tokens ---------- */
:root{
  --ink:#050A09;
  --bg:#08211B;
  --bg-deep:#061A15;
  --panel:#0F332A;
  --panel-2:#0B2A23;
  --cyan:#26E0C8;
  --cyan-soft:#A8F5E9;
  --amber:#E7B34A;
  --coral:#FF7A59;
  --white:#F3F8F5;
  --muted:#78958A;
  --line:#1B5B50;

  --font-head:"Barlow Condensed","Arial Narrow","Noto Sans SC",sans-serif;
  --font-editorial:"Noto Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;

  --r-sm:12px;
  --r-md:18px;
  --r-lg:28px;
  --r-xl:40px;
  --r-pill:999px;

  --shell:1200px;
  --gutter:clamp(18px,4vw,48px);
  --ease:cubic-bezier(.4,.14,.2,1);
  --shadow-panel:0 34px 70px -46px rgba(0,0,0,.95), inset 0 1px 0 rgba(168,245,233,.06);
}

/* ---------- 3. base ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--white);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 560px at 8% -8%, rgba(38,224,200,.14), transparent 62%),
    radial-gradient(900px 520px at 92% 2%, rgba(231,179,74,.10), transparent 66%),
    radial-gradient(760px 420px at 60% 40%, rgba(38,224,200,.05), transparent 70%),
    linear-gradient(180deg,#08211B 0%,#061A15 58%,#050A09 100%);
  background-repeat:no-repeat;
  background-attachment:scroll;
  padding-top:92px;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.06;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(2.5rem,6vw,5.5rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.75rem)}
h3{font-size:clamp(1.3rem,2vw,1.75rem)}
h4{font-size:clamp(1.05rem,1.5vw,1.25rem);letter-spacing:0}
p{margin-bottom:1em}
p:last-child{margin-bottom:0}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
#main-content{display:block;scroll-margin-top:120px}

/* ---------- 4. layout ---------- */
.container{width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto}
.container--wide{width:min(1380px,100% - var(--gutter) * 2);margin-inline:auto}
.grid{display:grid;gap:clamp(16px,2.6vw,28px)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.stack-panel{display:grid;gap:clamp(18px,3vw,32px)}

/* ---------- 5. components ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:26px;height:1px;
  background:linear-gradient(90deg,var(--cyan),rgba(38,224,200,0));
}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px;margin-bottom:clamp(18px,3vw,30px);
}
.section-lede{color:var(--muted);font-size:15.5px;max-width:52ch;margin:0}

.panel{
  position:relative;
  padding:clamp(20px,3vw,40px);
  border-radius:var(--r-lg);
  border:1px solid rgba(27,91,80,.85);
  background:linear-gradient(160deg,rgba(15,51,42,.94),rgba(8,33,27,.86));
  box-shadow:var(--shadow-panel);
}
.panel--ink{
  background:linear-gradient(160deg,#0A1D18,#050A09);
  border-color:rgba(38,224,200,.20);
}
.panel-head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:12px;margin-bottom:18px;
}
.panel-index{
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  letter-spacing:.16em;color:var(--amber);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(38,224,200,.36);
  background:rgba(38,224,200,.08);
  color:var(--cyan-soft);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
}
.tag--amber{border-color:rgba(231,179,74,.42);background:rgba(231,179,74,.10);color:var(--amber)}
.tag--coral{border-color:rgba(255,122,89,.42);background:rgba(255,122,89,.10);color:var(--coral)}

.legend{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:13px;color:var(--muted);
}
.legend-item{display:inline-flex;align-items:center;gap:8px}
.legend-dot{
  width:9px;height:9px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 12px currentColor;color:var(--cyan);
}
.legend-dot.is-cyan{background:var(--cyan);color:var(--cyan)}
.legend-dot.is-amber{background:var(--amber);color:var(--amber)}
.legend-dot.is-coral{background:var(--coral);color:var(--coral)}

.coord{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;color:var(--muted);
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-pill);
  border:1px solid transparent;cursor:pointer;text-align:center;
  font-family:var(--font-head);font-weight:600;font-size:15px;letter-spacing:.04em;
  transition:background 200ms var(--ease),color 200ms var(--ease),
             border-color 200ms var(--ease),box-shadow 200ms var(--ease),
             transform 200ms var(--ease);
}
.btn--primary{
  background:var(--cyan);color:#04231D;
  box-shadow:0 12px 30px -16px rgba(38,224,200,.95);
}
.btn--primary:hover{background:var(--cyan-soft)}
.btn--ghost{
  border-color:rgba(38,224,200,.45);color:var(--cyan-soft);
  background:rgba(38,224,200,.06);
}
.btn--ghost:hover{background:var(--cyan);color:#04231D;border-color:var(--cyan)}
.btn--quiet{
  border-color:rgba(27,91,80,1);color:var(--white);
  background:rgba(15,51,42,.65);
}
.btn--quiet:hover{border-color:var(--cyan);color:var(--cyan-soft)}
.btn--sm{padding:9px 16px;font-size:13.5px}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 24px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--cyan-soft)}

.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  border-radius:var(--r-lg);
  border:1px solid rgba(27,91,80,.9);
  background:
    linear-gradient(150deg,rgba(15,51,42,.95),rgba(6,26,21,.95)),
    repeating-linear-gradient(0deg,rgba(38,224,200,.10) 0 1px,transparent 1px 26px),
    repeating-linear-gradient(90deg,rgba(38,224,200,.10) 0 1px,transparent 1px 26px);
}
.media-frame > img,.media-frame > .media-frame-fill{
  width:100%;height:100%;object-fit:cover;
}
.media-frame::after{
  content:"";position:absolute;inset:0;border-radius:inherit;
  box-shadow:inset 0 0 0 1px rgba(168,245,233,.10);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}

.data-table{width:100%;font-size:14.5px}
.data-table caption{
  text-align:left;padding-bottom:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--amber);
}
.data-table th,.data-table td{
  padding:11px 12px;text-align:left;vertical-align:top;
  border-bottom:1px solid rgba(27,91,80,.7);
}
.data-table th{
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
}
.data-table tbody tr{transition:background 180ms var(--ease)}
.data-table tbody tr:hover{background:rgba(38,224,200,.06)}

/* reveal 协议：仅在 JS 可用时隐藏初始状态 */
.js-reveal [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity 460ms var(--ease),transform 460ms var(--ease);
}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 6. header ---------- */
.skip-link{
  position:fixed;top:10px;left:12px;z-index:200;
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--cyan);color:#04231D;
  font-weight:700;font-size:14px;
  transform:translateY(-180%);
  transition:transform 200ms var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  display:flex;justify-content:center;
  padding:clamp(8px,1.2vw,16px) clamp(12px,3vw,28px) 0;
  pointer-events:none;
}
.progress-rail{
  position:absolute;top:0;left:0;right:0;height:3px;
  background:rgba(27,91,80,.45);overflow:hidden;
}
.progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  box-shadow:0 0 14px rgba(38,224,200,.75);
  transition:width 90ms linear;
}
.header-shell{
  pointer-events:auto;
  position:relative;
  display:flex;align-items:center;
  gap:clamp(8px,1.6vw,20px);
  width:min(1240px,100%);
  padding:8px 10px 8px 18px;
  border-radius:var(--r-pill);
  background:rgba(7,28,23,.78);
  border:1px solid rgba(38,224,200,.16);
  box-shadow:0 26px 54px -34px rgba(0,0,0,1),inset 0 1px 0 rgba(168,245,233,.08);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:width 280ms var(--ease),padding 280ms var(--ease),
             background 280ms var(--ease),border-color 280ms var(--ease);
}
.site-header[data-compact="true"] .header-shell{
  width:min(1080px,100%);
  padding-block:5px;
  background:rgba(5,22,18,.92);
  border-color:rgba(38,224,200,.30);
}
.header-brand{
  display:inline-flex;align-items:center;gap:10px;
  padding:4px 6px;border-radius:var(--r-pill);
  flex:0 0 auto;
  transition:background 200ms var(--ease);
}
.header-brand:hover{background:rgba(38,224,200,.08)}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan) 0%,#0E8C7C 55%,var(--amber) 100%);
  box-shadow:0 0 18px -2px rgba(38,224,200,.7);
  transform:rotate(-8deg);
}
.brand-mark::before{
  content:"";position:absolute;inset:6px 7px;
  border-radius:2px 9px 2px 9px;
  background:rgba(5,10,9,.84);
}
.brand-mark-dot{
  position:absolute;right:-3px;bottom:-3px;
  width:8px;height:8px;border-radius:50%;
  background:var(--amber);box-shadow:0 0 9px var(--amber);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-name{
  font-family:var(--font-head);font-weight:700;
  font-size:clamp(15px,1.5vw,18px);letter-spacing:.02em;
  color:var(--white);white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.28em;
  text-transform:uppercase;color:var(--muted);white-space:nowrap;
}
.nav-capsule{
  margin-inline:auto;
  display:flex;align-items:center;
  padding:4px;border-radius:var(--r-pill);
  background:rgba(3,14,11,.58);
  border:1px solid rgba(27,91,80,.9);
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;padding:8px 13px;border-radius:var(--r-pill);
  font-size:14px;font-weight:500;white-space:nowrap;
  color:rgba(243,248,245,.78);
  transition:color 200ms var(--ease),background 200ms var(--ease),
             box-shadow 200ms var(--ease);
}
.nav-link:hover{color:var(--cyan-soft);background:rgba(38,224,200,.14)}
.nav-link[aria-current="page"]{
  color:#04231D;background:var(--cyan);font-weight:700;
  box-shadow:0 0 20px -6px rgba(38,224,200,.95);
}
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(38,224,200,.42);
  background:rgba(38,224,200,.08);color:var(--cyan-soft);
  font-family:var(--font-head);font-size:13px;font-weight:600;
  letter-spacing:.10em;cursor:pointer;
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(38,224,200,.16)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars span{
  display:block;height:2px;width:100%;border-radius:2px;background:currentColor;
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-3px) rotate(-45deg)}
.header-cta{flex:0 0 auto;margin-left:2px}

/* ---------- 7. footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,100px);
  padding:clamp(38px,6vw,76px) 0 0;
  color:var(--white);
  background:linear-gradient(180deg,#061A15 0%,#050A09 62%);
  border-top:1px solid rgba(38,224,200,.18);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:140px;
  background:radial-gradient(680px 140px at 12% 0,rgba(38,224,200,.16),transparent 72%);
  pointer-events:none;
}
.site-footer::after{
  content:"";position:absolute;right:-12%;bottom:-42%;width:520px;height:360px;
  background:radial-gradient(closest-side,rgba(231,179,74,.13),transparent 78%);
  pointer-events:none;
}
.footer-inner{position:relative;z-index:1}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid rgba(27,91,80,.7);
}
.footer-logo{
  display:inline-block;margin-bottom:10px;
  font-family:var(--font-head);font-weight:700;
  font-size:clamp(1.5rem,2.6vw,2rem);letter-spacing:.01em;
  transition:color 200ms var(--ease);
}
.footer-logo:hover{color:var(--cyan)}
.footer-tagline{
  font-family:var(--font-editorial);
  font-size:clamp(1.05rem,1.7vw,1.3rem);line-height:1.5;
  color:var(--cyan-soft);margin:0 0 14px;
}
.footer-desc{color:var(--muted);font-size:14.5px;max-width:36ch;margin:0}
.footer-route{
  display:flex;align-items:center;gap:10px;
  margin:20px 0 0;
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--amber);
}
.footer-route::before{
  content:"";flex:0 0 auto;width:10px;height:10px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 14px var(--cyan);
}
.footer-route::after{
  content:"";flex:1 1 auto;height:1px;
  background:linear-gradient(90deg,rgba(38,224,200,.7),rgba(38,224,200,0));
}
.footer-cols{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1.5fr);
  gap:clamp(18px,3vw,36px);
}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--muted);
}
.footer-links{display:grid;gap:9px;font-size:14.5px}
.footer-links a{
  display:inline-block;color:rgba(243,248,245,.82);
  transition:color 180ms var(--ease),transform 180ms var(--ease);
}
.footer-links a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{display:grid;gap:12px}
.footer-label{
  display:block;margin-bottom:3px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--amber);
}
.footer-value{
  display:block;font-size:13.5px;line-height:1.6;
  color:rgba(243,248,245,.80);word-break:break-word;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;
  padding:20px 0 28px;
  font-size:12.5px;color:var(--muted);
}
.footer-copy{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.footer-legal a{color:rgba(243,248,245,.70);transition:color 180ms var(--ease)}
.footer-legal a:hover{color:var(--cyan)}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--muted);
}

/* ---------- 8. responsive ---------- */
@media (max-width:1080px){
  .nav-link{padding:7px 10px;font-size:13px}
  .brand-sub{display:none}
  .header-shell{padding-left:14px}
}
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--contact{grid-column:1 / -1}
}
@media (max-width:940px){
  body{padding-top:84px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-capsule{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:block;margin:0;padding:10px;
    border-radius:26px;
    background:rgba(6,25,21,.97);
    border-color:rgba(27,91,80,1);
    box-shadow:0 34px 64px -32px rgba(0,0,0,1);
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-10px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms var(--ease);
  }
  .nav-capsule[data-open="true"]{
    opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:12px 16px;border-radius:14px;font-size:16px}
  .nav-link[aria-current="page"]{border-radius:14px}
  .grid--7-5,.grid--8-4,.grid--3{grid-template-columns:minmax(0,1fr)}
  .header-cta{margin-left:0}
}
@media (max-width:640px){
  .grid--3{grid-template-columns:minmax(0,1fr)}
  .footer-cols{grid-template-columns:1fr}
  .footer-col--contact{grid-column:auto}
  .footer-bottom{justify-content:flex-start;gap:10px}
}
@media (max-width:520px){
  .header-cta{display:none}
  .header-shell{padding:7px 8px 7px 12px}
  .brand-name{font-size:15px}
}

/* ---------- 9. a11y ---------- */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}
@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;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .nav-capsule{transition:none}
}