/* ============================================================
   3499游戏 · 共享站点样式 /assets/site.css
   设计语言：赛博游戏厅 × 高原夜色 / 悬浮胶囊 + 切角面板
   ============================================================ */

:root{
  /* 色彩 */
  --ink-0:#07060F;
  --ink-1:#12101F;
  --ink-2:#191630;
  --violet:#7C3AED;
  --violet-soft:#A78BFA;
  --cyan:#22D3EE;
  --orange:#FF8A3D;
  --star:#F4F2FF;
  --mauve:#A79FC7;
  --mint:#4ADE80;
  --coral:#FB7185;
  --line:rgba(167,159,199,.20);
  --line-strong:rgba(167,159,199,.34);

  /* 字体 */
  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif SC","STSong","SimSun",Georgia,serif;
  --font-body:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;

  /* 尺寸 */
  --shell:1240px;
  --gutter:clamp(18px,4vw,48px);
  --cut:20px;
  --cut-sm:12px;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:dark;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  background:var(--ink-0);
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100vh;
  background:transparent;
  color:var(--star);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.78;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p,figure{margin:0}
a{color:var(--cyan);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--star)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(124,58,237,.6);color:#fff}

/* 环境光：固定暗部渐变，只做氛围不压文字 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(60% 50% at 82% -6%, rgba(124,58,237,.30), transparent 70%),
    radial-gradient(48% 42% at 4% 8%, rgba(34,211,238,.13), transparent 72%),
    radial-gradient(52% 46% at 50% 112%, rgba(255,138,61,.10), transparent 74%);
}
#main-content{position:relative;z-index:1;display:block}
#main-content:focus{outline:none}

/* ---------- 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(40px,6vw,88px)}
.split{
  display:grid;
  grid-template-columns:38fr 62fr;
  gap:clamp(20px,4vw,56px);
  align-items:start;
}
.split--45{grid-template-columns:45fr 55fr}
.split--reverse{grid-template-columns:62fr 38fr}
.grid{display:grid;gap:clamp(14px,2vw,22px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fill,minmax(min(100%,250px),1fr))}

/* ---------- 文字系统 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(2.6rem,6vw,4.7rem);
  line-height:1.05;
  letter-spacing:-.02em;
  text-wrap:balance;
  color:var(--star);
  text-shadow:
    2px 0 0 rgba(124,58,237,.55),
   -2px 0 0 rgba(34,211,238,.22),
    0 0 34px rgba(124,58,237,.35);
}
.h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(1.65rem,3.2vw,2.5rem);
  line-height:1.18;
  letter-spacing:-.015em;
  color:var(--star);
  text-wrap:balance;
}
.h3{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.1rem,1.8vw,1.38rem);
  line-height:1.34;
  letter-spacing:-.008em;
  color:var(--star);
}
.editorial{
  font-family:var(--font-serif);
  font-weight:600;
  letter-spacing:.012em;
  line-height:1.8;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:linear-gradient(90deg,var(--cyan),rgba(34,211,238,0));
}
.lede{
  font-family:var(--font-serif);
  font-size:clamp(1.02rem,1.5vw,1.18rem);
  line-height:1.92;
  color:#D9D4F0;
  max-width:34em;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.05em;
  color:var(--cyan);
}
.muted{color:var(--mauve)}
.prose{max-width:68ch;color:#DEDAF2}
.prose p{margin-bottom:1.1em}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{margin:1.6em 0 .6em;font-family:var(--font-display);line-height:1.25}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.3em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--star);font-weight:700}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  border-radius:12px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:1rem;
  letter-spacing:.01em;
  line-height:1.2;
  text-align:center;
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{
  background:linear-gradient(135deg,#FFA861,var(--orange) 55%,#F2701F);
  color:#1F0D02;
  box-shadow:0 0 0 1px rgba(255,138,61,.45),0 14px 34px -16px rgba(255,138,61,.95);
}
.btn--primary:hover{
  color:#1F0D02;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(255,138,61,.72),0 20px 44px -14px rgba(255,138,61,1);
}
.btn--primary:active{transform:translateY(0) scale(.985)}
.btn--ghost{
  background:rgba(124,58,237,.14);
  border-color:var(--line-strong);
  color:var(--star);
}
.btn--ghost:hover{
  background:rgba(124,58,237,.28);
  border-color:rgba(34,211,238,.6);
  color:var(--star);
}

/* ---------- 状态标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  line-height:1.7;
  background:rgba(244,242,255,.04);
  color:var(--mauve);
}
.tag--ok{color:var(--mint);border-color:rgba(74,222,128,.45);background:rgba(74,222,128,.10)}
.tag--warn{color:var(--coral);border-color:rgba(251,113,133,.45);background:rgba(251,113,133,.10)}
.tag--info{color:var(--cyan);border-color:rgba(34,211,238,.42);background:rgba(34,211,238,.08)}

/* ---------- 切角面板 / 分隔 / 扫描 ---------- */
.panel{
  --cut:20px;
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(158deg,rgba(124,58,237,.18),rgba(18,16,31,.95) 54%,rgba(11,10,22,.97));
  box-shadow:
    inset 0 0 0 1px rgba(167,159,199,.20),
    inset 0 1px 0 rgba(244,242,255,.06),
    0 26px 50px -34px rgba(0,0,0,.95);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.scan-rule{
  height:1px;
  border:0;
  margin:clamp(24px,4vw,46px) 0;
  background:linear-gradient(90deg,rgba(34,211,238,0),rgba(34,211,238,.55) 22%,rgba(124,58,237,.62) 62%,rgba(34,211,238,0));
}
.scan{position:relative;overflow:hidden;isolation:isolate}
.scan::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.45;
  background:repeating-linear-gradient(180deg,rgba(244,242,255,.05) 0 1px,transparent 1px 4px);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(18px,3vw,30px);font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;color:var(--mauve)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(167,159,199,.5)}
.breadcrumb a{color:var(--mauve);border-bottom:1px solid rgba(34,211,238,.35);padding-bottom:1px}
.breadcrumb a:hover{color:var(--cyan);border-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--star)}

/* ---------- 媒体容器基础规则（页面阶段放占位图） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  border-radius:16px;
  border:1px solid var(--line);
  background:
    radial-gradient(120% 120% at 18% 0%,rgba(124,58,237,.42),rgba(10,9,20,.96) 68%),
    linear-gradient(180deg,rgba(34,211,238,.10),transparent 60%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame--slant{
  border-radius:0;
  clip-path:polygon(0 0,100% 0,100% 84%,calc(100% - 30px) 100%,0 100%);
}
.media-frame--portrait{aspect-ratio:9/16}
.media-frame--square{aspect-ratio:1/1}
.media-caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:12px 16px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:rgba(244,242,255,.86);
  background:linear-gradient(180deg,transparent,rgba(7,6,15,.88));
}

/* ---------- 显现动效（JS 加 .is-in） ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease) var(--reveal-delay,0ms),transform .5s var(--ease) var(--reveal-delay,0ms);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ============================================================
   头部：悬浮胶囊浮岛
   ============================================================ */
.skip-link{
  position:fixed;
  top:12px;left:16px;
  z-index:200;
  padding:10px 18px;
  border-radius:10px;
  background:var(--orange);
  color:#1F0D02;
  font-family:var(--font-display);
  font-weight:800;
  font-size:.94rem;
  box-shadow:0 12px 30px -14px rgba(255,138,61,.95);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0);color:#1F0D02}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:16px var(--gutter) 0;
  transition:padding .2s var(--ease);
}
.site-header.is-condensed{padding-top:8px}

.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  max-width:var(--shell);
  margin-inline:auto;
  padding:9px 10px 9px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(26,22,48,.94),rgba(11,10,22,.92));
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
  box-shadow:0 20px 44px -28px rgba(0,0,0,.95),inset 0 1px 0 rgba(244,242,255,.07);
  transition:padding .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-condensed .header-inner{
  padding-top:5px;
  padding-bottom:5px;
  box-shadow:0 14px 34px -22px rgba(0,0,0,1),inset 0 1px 0 rgba(244,242,255,.05);
}

/* 品牌署名 + 像素标记 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--star);
}
.brand:hover{color:var(--star)}
.brand-mark{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  grid-template-rows:repeat(2,1fr);
  gap:2px;
  width:26px;
  height:26px;
  padding:3px;
  border-radius:8px;
  background:linear-gradient(140deg,var(--violet),#3A1E78);
  box-shadow:0 0 0 1px rgba(34,211,238,.35),0 0 18px rgba(124,58,237,.6);
}
.brand-mark i{display:block;border-radius:1px;background:var(--star);opacity:.92}
.brand-mark i:nth-child(2){background:var(--cyan)}
.brand-mark i:nth-child(3){background:var(--orange)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.04rem;
  letter-spacing:-.01em;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.16em;
  color:var(--mauve);
  margin-top:2px;
}

/* 胶囊导航 */
.nav-dock{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none}
.nav-link{
  display:inline-block;
  padding:8px 13px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.94rem;
  letter-spacing:.01em;
  color:var(--mauve);
  white-space:nowrap;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-link:hover{color:var(--star);background:rgba(124,58,237,.26)}
.nav-link[aria-current="page"]{
  color:var(--star);
  border-color:rgba(34,211,238,.65);
  background:rgba(34,211,238,.09);
  box-shadow:inset 0 0 0 1px rgba(34,211,238,.16),0 0 18px -5px rgba(34,211,238,.65);
}

/* 右侧行动区 */
.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.header-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:999px;
  background:linear-gradient(135deg,#FFA861,var(--orange) 60%,#F2701F);
  color:#1F0D02;
  font-family:var(--font-display);
  font-weight:800;
  font-size:.94rem;
  letter-spacing:.02em;
  white-space:nowrap;
  box-shadow:0 0 0 1px rgba(255,138,61,.5),0 12px 28px -14px rgba(255,138,61,.95);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.header-cta::after{
  content:"";
  width:7px;height:7px;
  background:#1F0D02;
  clip-path:polygon(0 0,100% 50%,0 100%);
}
.header-cta:hover{
  color:#1F0D02;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,138,61,.75),0 16px 32px -12px rgba(255,138,61,1);
}
.header-cta:active{transform:translateY(0) scale(.985)}

/* 移动选关按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(124,58,237,.20);
  color:var(--star);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.9rem;
  cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(124,58,237,.34);border-color:rgba(34,211,238,.5)}
.nav-toggle-bars{
  display:block;
  width:16px;height:2px;
  background:var(--cyan);
  box-shadow:0 5px 0 var(--cyan),0 -5px 0 var(--cyan);
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-toggle-text{line-height:1}
.site-header[data-open] .nav-toggle-bars{
  background:var(--orange);
  box-shadow:0 5px 0 var(--orange),0 -5px 0 var(--orange);
}

/* 顶部滚动进度光带 */
.scroll-meter{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:95;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 58%,var(--orange));
  pointer-events:none;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,8vw,110px);
  padding-top:clamp(34px,5vw,64px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(18,16,31,.92),rgba(7,6,15,.99) 46%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(124,58,237,.85) 28%,rgba(34,211,238,.75) 68%,transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1.35fr;
  gap:clamp(22px,3.4vw,46px);
  padding-bottom:clamp(26px,4vw,46px);
}
.brand--footer .brand-name{font-size:1.06rem}
.footer-tagline{
  margin-top:14px;
  max-width:26ch;
  font-family:var(--font-serif);
  font-size:.98rem;
  line-height:1.84;
  color:#CFC9E8;
}
.footer-meta{
  margin-top:12px;
  font-size:.72rem;
  letter-spacing:.16em;
  color:var(--mauve);
}
.footer-heading{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-list{display:grid;gap:10px;list-style:none}
.footer-list a{
  display:inline-block;
  font-size:.94rem;
  color:var(--mauve);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--star);border-color:rgba(34,211,238,.6)}
.footer-item{display:block}
.footer-label{
  display:block;
  margin-bottom:2px;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.16em;
  color:rgba(167,159,199,.78);
}
.footer-value{
  display:block;
  font-size:.92rem;
  line-height:1.7;
  color:#D9D4F1;
  overflow-wrap:anywhere;
}
.footer-value--mono{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:var(--cyan);
}
.footer-bar{
  border-top:1px solid rgba(167,159,199,.14);
  background:rgba(7,6,15,.72);
}
.footer-bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:16px var(--gutter);
}
.footer-legal,.footer-copy{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  color:rgba(167,159,199,.86);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1040px){
  .nav-toggle{display:inline-flex}
  .header-inner{padding-right:8px}
  .nav-dock{
    position:absolute;
    top:calc(100% + 10px);
    left:0;right:0;
    display:none;
    flex-direction:column;
    padding:10px;
    border-radius:22px;
    border:1px solid var(--line);
    background:linear-gradient(160deg,rgba(26,22,48,.99),rgba(10,9,20,.99));
    box-shadow:0 30px 60px -30px rgba(0,0,0,1),inset 0 1px 0 rgba(244,242,255,.06);
  }
  .site-header[data-open] .nav-dock{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .nav-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:12px 15px;
    border-radius:14px;
    font-size:1rem;
    color:var(--star);
    background:rgba(244,242,255,.03);
  }
  .nav-link::after{
    content:"›";
    font-family:var(--font-mono);
    color:rgba(167,159,199,.7);
  }
  .nav-link[aria-current="page"]{background:rgba(34,211,238,.12)}
  .nav-link[aria-current="page"]::after{color:var(--cyan)}
}

@media (max-width:900px){
  .split,.split--45,.split--reverse{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:820px){
  body{font-size:16px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:560px){
  .brand-sub{display:none}
  .brand-name{font-size:.98rem}
  .header-cta{padding:9px 14px;font-size:.88rem}
  .nav-toggle{padding:8px 12px}
  .nav-toggle-text{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bar-inner{flex-direction:column;align-items:flex-start}
  .btn{width:100%;padding:14px 20px}
}

/* ============================================================
   减弱动效
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
  .btn:hover,.header-cta:hover{transform:none}
}