/* 2278游戏 · Site Kit — 暗色悬浮控制台 */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,picture,video{max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}
hr{border:0}

:root{
  --void:#070B14;
  --panel:#0E1626;
  --lift:#16223A;
  --line:#25405A;
  --line-soft:rgba(37,64,90,.55);
  --cyan:#35F2E6;
  --violet:#8B5CF6;
  --amber:#FFB020;
  --ink:#EAF2FF;
  --muted:#8FA3BF;
  --ok:#46E39B;
  --warn:#FF5D6C;
  --cream:#F7F1E3;
  --font-display:"Alibaba PuHuiTi Heavy","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --wrap:1200px;
  --gut:clamp(16px,4vw,40px);
  --r:3px;
  --hdr-h:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  min-height:100vh;
  background:
    radial-gradient(920px 540px at 84% -8%,rgba(139,92,246,.20),transparent 62%),
    radial-gradient(760px 480px at 4% 2%,rgba(53,242,230,.11),transparent 60%),
    var(--void);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}

::selection{background:rgba(53,242,230,.28);color:#fff}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--ink);
}
h1{font-size:clamp(2.3rem,5.4vw,3.9rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:clamp(1.12rem,1.9vw,1.42rem)}
h4{font-size:1rem;letter-spacing:.04em}

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

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.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}
.hairline{height:1px;background:var(--line-soft)}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gut)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:-70px;left:16px;z-index:200;
  padding:10px 16px;border-radius:var(--r);
  background:var(--cyan);color:#04121A;
  font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.06em;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:60}
.hdr::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,11,20,.96),rgba(7,11,20,.62) 68%,rgba(7,11,20,0));
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.hdr[data-scrolled]::before{
  background:rgba(14,22,38,.96);
  border-bottom-color:var(--line);
}

.hdr__rail{
  position:relative;z-index:1;
  max-height:44px;overflow:hidden;
  border-bottom:1px solid rgba(37,64,90,.45);
  transition:max-height .32s var(--ease),opacity .24s var(--ease),border-color .3s var(--ease);
}
.hdr[data-scrolled] .hdr__rail{max-height:0;opacity:0;border-bottom-color:transparent}
.hdr__rail-inner{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:32px;
  font-size:12px;color:var(--muted);
}
.rail__coord{font-size:11px;letter-spacing:.18em;color:var(--cyan);opacity:.85;white-space:nowrap}
.rail__status{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.status-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(70,227,155,.16),0 0 12px rgba(70,227,155,.8);
  animation:dot-pulse 3.6s ease-in-out infinite;
  flex:0 0 auto;
}
@keyframes dot-pulse{0%,100%{opacity:1}50%{opacity:.4}}
.rail__links{display:flex;align-items:center;gap:20px}
.rail-link{
  color:var(--muted);text-decoration:none;font-size:12px;letter-spacing:.04em;
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
  white-space:nowrap;
}
.rail-link:hover,.rail-link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}

.hdr__bar{position:relative;z-index:1}
.hdr__inner{
  position:relative;z-index:2;
  display:flex;align-items:center;gap:clamp(12px,2.4vw,32px);
  min-height:68px;
  transition:min-height .3s var(--ease);
}
.hdr[data-scrolled] .hdr__inner{min-height:58px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none;color:var(--ink)}
.brand__mark{
  display:grid;place-items:center;
  width:46px;height:38px;
  background:var(--cyan);color:#04121A;
  font-size:13px;font-weight:700;letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% 66%,76% 100%,0 100%);
  box-shadow:0 0 20px -6px rgba(53,242,230,.85);
  flex:0 0 auto;
}
.brand__text{display:flex;flex-direction:column;line-height:1.12}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:17px;letter-spacing:.02em}
.brand__sub{font-size:11px;color:var(--muted);letter-spacing:.1em;margin-top:3px}

.nav{flex:1 1 auto;min-width:0;display:flex;justify-content:center}
.nav__list{display:flex;align-items:center;gap:clamp(4px,1.5vw,20px)}
.nav__item{list-style:none}
.nav__link{
  position:relative;display:inline-block;
  padding:10px 3px;
  font-size:14px;letter-spacing:.04em;
  color:var(--muted);text-decoration:none;
  transition:color .2s;
  white-space:nowrap;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease),box-shadow .2s;
}
.nav__link:hover{color:var(--ink)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--cyan)}
.nav__link[aria-current="page"]::after{transform:scaleX(1);box-shadow:0 0 10px rgba(53,242,230,.85)}
.nav__num{display:none}
.nav__foot{display:none}
.nav__note{font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:.04em}

.hdr__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}

/* ---------- buttons ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--ink);
  --btn-bd:var(--line);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;
  border:1px solid var(--btn-bd);border-radius:var(--r);
  background:var(--btn-bg);color:var(--btn-fg);
  font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.06em;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .24s var(--ease),background .2s,color .2s,border-color .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  --btn-bg:var(--cyan);--btn-fg:#04121A;--btn-bd:var(--cyan);
}
.btn--primary:hover{box-shadow:0 10px 28px -16px rgba(53,242,230,.95),0 0 0 3px rgba(53,242,230,.14)}
.btn--ghost{
  --btn-bg:rgba(22,34,58,.62);--btn-fg:var(--ink);--btn-bd:var(--line);
}
.btn--ghost:hover{--btn-bd:var(--violet);box-shadow:0 10px 26px -18px rgba(139,92,246,.95)}
.btn--quiet{--btn-bg:transparent;--btn-fg:var(--muted);--btn-bd:transparent;padding:8px 4px}
.btn--quiet:hover{--btn-fg:var(--cyan)}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;letter-spacing:.04em;color:var(--cyan);text-decoration:none;
  border-bottom:1px solid rgba(53,242,230,.35);padding-bottom:2px;
  transition:border-color .2s,color .2s;
}
.link-arrow::after{content:"→";transition:transform .24s var(--ease)}
.link-arrow:hover{border-bottom-color:var(--cyan)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- mobile toggle ---------- */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(22,34,58,.72);
  color:var(--ink);cursor:pointer;
  font-family:var(--font-display);font-size:12px;font-weight:700;
  transition:border-color .2s,box-shadow .2s;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:currentColor;transition:background .2s}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform .26s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{letter-spacing:.1em}

/* ---------- footer ---------- */
.ftr{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,22,38,.92),rgba(7,11,20,1));
}
.ftr::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,230,.7),rgba(139,92,246,.7),transparent);
}
.ftr__inner{padding-block:clamp(36px,6vw,64px) 26px}
.ftr__top{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:clamp(24px,4vw,48px);
  align-items:start;
  padding-bottom:32px;
  border-bottom:1px solid var(--line-soft);
}
.ftr__brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px;max-width:36ch}
.ftr__name{font-family:var(--font-display);font-weight:900;font-size:20px;letter-spacing:.02em;color:var(--ink);line-height:1.3}
.ftr__tag{font-size:13px;line-height:1.85;color:var(--muted)}
.ftr__readout{display:flex;flex-wrap:wrap;gap:10px}
.readout{
  min-width:96px;
  padding:10px 14px;
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(22,34,58,.55);
}
.readout__label{display:block;font-size:10px;letter-spacing:.16em;color:var(--muted)}
.readout__value{display:block;margin-top:4px;font-size:22px;line-height:1.2;color:var(--amber)}
.ftr__ok{color:var(--ok)}

.ftr__cols{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:clamp(22px,3.4vw,44px);
  padding-block:clamp(26px,4vw,38px);
}
.ftr__col-title{
  font-family:var(--font-display);font-size:11px;font-weight:700;
  letter-spacing:.2em;color:var(--cyan);
  margin-bottom:16px;
}
.ftr__list{display:flex;flex-direction:column;gap:10px}
.ftr__link{
  display:inline-block;
  font-size:14px;color:var(--muted);text-decoration:none;
  transition:color .2s,transform .2s var(--ease);
}
.ftr__link:hover,.ftr__link:focus-visible{color:var(--ink);transform:translateX(2px)}
.ftr__contact{display:flex;flex-direction:column;gap:10px;font-size:13px;line-height:1.7;color:var(--muted)}
.ftr__contact .mono{color:var(--ink);font-size:12.5px;word-break:break-all}

.ftr__bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 24px;
  padding-top:22px;
  border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--muted);
}
.ftr__legal{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px}
.ftr__icp{font-family:var(--font-mono);letter-spacing:.04em}
.ftr__note{font-size:12px;color:var(--muted);max-width:52ch}

/* ---------- layout primitives ---------- */
.section{padding-block:clamp(38px,6vw,82px)}
.section--tight{padding-block:clamp(22px,3vw,38px)}
.prose{max-width:38em;font-size:16px;line-height:1.85;color:var(--muted)}
.prose p+p{margin-top:14px}
.prose strong{color:var(--ink);font-weight:700}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(53,242,230,.35)}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}

/* ---------- panel ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(180deg,rgba(22,34,58,.72),rgba(14,22,38,.72));
  box-shadow:inset 0 1px 0 rgba(234,242,255,.04),0 26px 50px -42px rgba(0,0,0,.95);
}
.panel--lift{background:var(--lift)}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding-bottom:14px;margin-bottom:16px;
  border-bottom:1px solid var(--line-soft);
}
.panel__title{font-family:var(--font-display);font-size:15px;font-weight:700;letter-spacing:.05em;color:var(--ink)}
.panel__note{font-size:12px;color:var(--muted);font-family:var(--font-mono)}

/* ---------- tags / kicker ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;
  color:var(--cyan);text-transform:uppercase;
}
.kicker::before{content:"";width:26px;height:1px;background:var(--cyan);flex:0 0 auto}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--line);border-radius:999px;
  background:rgba(22,34,58,.62);
  font-size:11px;letter-spacing:.1em;color:var(--muted);
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,242,230,.42);background:rgba(53,242,230,.08)}
.tag--violet{color:#C4B2FF;border-color:rgba(139,92,246,.5);background:rgba(139,92,246,.12)}
.tag--amber{color:var(--amber);border-color:rgba(255,176,32,.42);background:rgba(255,176,32,.08)}
.tag--ok{color:var(--ok);border-color:rgba(70,227,155,.42);background:rgba(70,227,155,.08)}

/* ---------- readouts / price ---------- */
.price{
  display:inline-block;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(2rem,4.6vw,3.2rem);line-height:1;
  letter-spacing:-.02em;color:var(--amber);
}
.price__unit{font-size:.38em;letter-spacing:.08em;color:var(--muted);margin-left:6px}

/* ---------- lists ---------- */
.bullets{display:flex;flex-direction:column;gap:10px}
.bullets li{position:relative;padding-left:18px;font-size:14px;line-height:1.8;color:var(--muted)}
.bullets li::before{content:"▸";position:absolute;left:0;top:0;color:var(--cyan);font-size:11px;line-height:1.9}
.bullets strong{color:var(--ink)}

/* ---------- table ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.ledger{width:100%;border-collapse:collapse;font-size:14px;color:var(--muted)}
.ledger th,.ledger td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line-soft);white-space:nowrap}
.ledger th{font-size:11px;font-weight:500;letter-spacing:.16em;color:var(--muted)}
.ledger tbody tr{transition:background .2s}
.ledger tbody tr:hover{background:rgba(53,242,230,.05)}
.ledger td.num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:18px;color:var(--amber);text-align:right;
}
.ledger td.key{color:var(--ink);font-weight:500}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:clamp(14px,2vw,22px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--muted)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb__sep{color:var(--line);font-family:var(--font-mono)}
.breadcrumb__current{color:var(--ink)}

/* ---------- media ---------- */
.media{
  position:relative;isolation:isolate;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(160deg,var(--lift),var(--panel));
}
.media::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(120% 80% at 82% -10%,rgba(53,242,230,.18),transparent 60%),
    radial-gradient(100% 80% at 0% 110%,rgba(139,92,246,.20),transparent 62%);
}
.media__img,.media img,.media picture{display:block;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--wide{aspect-ratio:21/9}
.media__cap{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:14px 16px;
  font-size:12px;line-height:1.6;color:var(--muted);
  background:linear-gradient(0deg,rgba(7,11,20,.94),rgba(7,11,20,0));
}

/* ---------- injected: progress + to-top ---------- */
.read-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:120;
  background:rgba(37,64,90,.5);pointer-events:none;
}
.read-progress__bar{
  height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 62%,var(--amber));
  box-shadow:0 0 12px rgba(53,242,230,.65);
}
.to-top{
  position:fixed;right:clamp(14px,3vw,32px);bottom:clamp(14px,3vw,32px);z-index:80;
  width:44px;height:44px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(22,34,58,.94);color:var(--cyan);
  font-family:var(--font-mono);font-size:16px;line-height:1;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,border-color .2s,box-shadow .2s;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan);box-shadow:0 0 22px -8px rgba(53,242,230,.9)}

/* ---------- reveal ---------- */
.reveal-init{opacity:0;transform:translateY(12px)}
.reveal-init.is-in{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease)}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  :root{--hdr-h:62px}
  .hdr__rail{display:none}
  .hdr__inner{min-height:62px}
  .hdr[data-scrolled] .hdr__inner{min-height:56px}
  .hdr__cta{display:none}
  .nav-toggle{display:inline-flex}

  .nav{
    position:fixed;inset:0;z-index:1;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;
    padding:calc(var(--hdr-h) + 22px) var(--gut) 40px;
    overflow-y:auto;
    background:
      radial-gradient(640px 420px at 88% -6%,rgba(139,92,246,.24),transparent 62%),
      radial-gradient(520px 380px at 0% 100%,rgba(53,242,230,.12),transparent 60%),
      rgba(7,11,20,.985);
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
  }
  .nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .nav__list{flex-direction:column;align-items:stretch;gap:0;border-top:1px solid var(--line-soft)}
  .nav__item{border-bottom:1px solid var(--line-soft)}
  .nav__link{
    display:flex;align-items:center;gap:14px;
    padding:16px 4px;
    font-family:var(--font-display);font-size:18px;font-weight:700;
    color:var(--ink);
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--cyan)}
  .nav__num{display:inline-block;min-width:22px;font-family:var(--font-mono);font-size:11px;color:var(--cyan);opacity:.75}
  .nav__foot{display:flex;flex-direction:column;gap:14px;margin-top:28px}
  .nav__foot .btn{width:100%;padding:13px 18px}

  .ftr__top{grid-template-columns:1fr}
  .ftr__brand{max-width:none}
}

@media (max-width:900px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .grid--12>*{grid-column:1/-1}
}

@media (max-width:720px){
  body{font-size:15.5px}
  .hdr__inner{gap:10px}
  .brand__sub{display:none}
  .brand__mark{width:42px;height:34px;font-size:12px}
  .brand__name{font-size:15px}
  .ftr__bottom{flex-direction:column;align-items:flex-start}
  .ftr__note{max-width:none}
  .readout{min-width:0;flex:1 1 92px}
}

@media (max-width:420px){
  .nav-toggle__label{display:none}
  .rail__coord{display:none}
}

@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;
  }
  .reveal-init{opacity:1;transform:none}
  .btn:hover,.ftr__link:hover{transform:none}
}