/* ===== 极悦娱乐 共享外壳样式 ===== */

:root{
  --c-deep:#070B1E;
  --c-ink:#02040A;
  --c-paper:#F2E9D8;
  --c-cyan:#2EF2D6;
  --c-violet:#7B5CFF;
  --c-gold:#F5B94C;
  --c-magenta:#E8458B;
  --c-mist:#8AA0C9;
  --c-fog:#E9EDF5;
  --c-inktext:#171B2C;
  --c-line:rgba(138,160,201,.26);
  --c-line-strong:rgba(138,160,201,.48);
  --c-line-dark:rgba(23,27,44,.14);
  --font-title:'Noto Sans SC Expanded','Source Han Sans SC Heavy','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono','SFMono-Regular',Consolas,'Courier New',monospace;
  --shell-w:1280px;
  --gap:clamp(16px,2.2vw,32px);
  --header-h:74px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  overflow-x:clip;
  background:var(--c-deep);
  color:var(--c-fog);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-title);
  font-weight:800;
  letter-spacing:-.005em;
  line-height:1.25;
  color:var(--c-fog);
}

h1{font-size:clamp(34px,4.4vw,52px)}
h2{font-size:clamp(26px,3vw,38px)}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:18px}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:var(--c-cyan);text-decoration:none;transition:color .2s ease}
a:hover{color:#96F8E8}

img{display:block;max-width:100%;height:auto}

ul,ol{margin:0;padding:0;list-style:none}

button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

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

.skip-link{
  position:absolute;
  left:var(--gap);
  top:-120px;
  z-index:200;
  padding:10px 18px;
  background:var(--c-cyan);
  color:var(--c-ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  transition:top .18s ease;
}
.skip-link:focus{top:12px;color:var(--c-ink)}

.mono,.tag{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
}
.tag{
  display:inline-block;
  padding:3px 9px;
  border:1px solid var(--c-line-strong);
  color:var(--c-mist);
}
.tag--cyan{border-color:rgba(46,242,214,.55);color:var(--c-cyan)}
.tag--gold{border-color:rgba(245,185,76,.55);color:var(--c-gold)}
.tag--magenta{border-color:rgba(232,69,139,.55);color:var(--c-magenta)}

.eyebrow{
  display:inline-block;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-cyan);
}

.rule{
  height:1px;
  margin:0;
  border:0;
  background:var(--c-line);
}

/* ===== 容器与网格 ===== */

.shell{
  width:min(100% - 2 * var(--gap), var(--shell-w));
  margin-inline:auto;
}
.shell--narrow{width:min(100% - 2 * var(--gap), 880px)}
.shell--wide{width:min(100% - 2 * var(--gap), 1440px)}

.site-main{
  display:block;
  padding-top:var(--header-h);
}
.site-main--flush{padding-top:0}

.grid{
  display:grid;
  gap:var(--gap);
}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(248px,1fr))}
.grid--index{grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}

/* ===== 按钮 ===== */

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border:1px solid var(--c-line-strong);
  background:transparent;
  color:var(--c-fog);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  line-height:1;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--c-cyan);border-color:var(--c-cyan);color:var(--c-ink)}
.btn--primary:hover{background:#5BF7E1;color:var(--c-ink)}
.btn--line{border-color:var(--c-cyan);color:var(--c-cyan)}
.btn--line:hover{background:rgba(46,242,214,.12);color:var(--c-cyan)}
.btn--ghost{border-color:transparent;color:var(--c-mist)}
.btn--ghost:hover{color:var(--c-fog)}

/* ===== 面包屑 ===== */

.breadcrumb{margin-bottom:clamp(18px,2.6vw,30px)}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--c-mist);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb li + li::before{content:"/";color:var(--c-line-strong)}
.breadcrumb a{color:var(--c-mist)}
.breadcrumb a:hover{color:var(--c-cyan)}

/* ===== 暖纸档案卡 ===== */

.paper-panel{
  background:var(--c-paper);
  color:var(--c-inktext);
  border:1px solid var(--c-line-dark);
  padding:clamp(22px,3.4vw,44px);
}
.paper-panel h1,.paper-panel h2,.paper-panel h3,.paper-panel h4{color:var(--c-inktext)}
.paper-panel a{color:#0B6154}
.paper-panel a:hover{color:#0A3F38}
.paper-panel .eyebrow{color:#0B6154}
.paper-panel .rule{background:var(--c-line-dark)}

/* ===== 图片容器 ===== */

.figure{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--c-line);
  background:
    linear-gradient(135deg,#0C1234 0%,#060A18 52%,#0A0620 100%);
}
.figure--wide{aspect-ratio:16/9}
.figure--tall{aspect-ratio:3/4}
.figure--square{aspect-ratio:1/1}
.figure--panorama{aspect-ratio:21/9}

.figure-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.figure::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(2,4,10,0) 42%,rgba(2,4,10,.76) 100%);
}

.figure-tag{
  position:absolute;
  top:14px;
  left:14px;
  z-index:2;
  padding:5px 9px;
  background:rgba(2,4,10,.62);
  border:1px solid rgba(46,242,214,.55);
  color:var(--c-cyan);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.figure-caption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--c-fog);
}

/* ===== 页头 ===== */

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  color:var(--c-fog);
  transition:background .32s ease,border-color .32s ease,backdrop-filter .32s ease;
}
.site-header[data-scrolled]{
  background:rgba(7,11,30,.96);
  border-bottom-color:var(--c-line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header[data-open]{
  background:rgba(7,11,30,.985);
  border-bottom-color:var(--c-line);
}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,30px);
  width:min(100% - 2 * var(--gap), var(--shell-w));
  min-height:var(--header-h);
  margin-inline:auto;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  order:1;
  flex:0 0 auto;
  color:var(--c-fog);
}
.brand-mark{
  display:block;
  width:12px;
  height:28px;
  background:linear-gradient(180deg,var(--c-cyan) 0%,var(--c-violet) 100%);
  clip-path:polygon(0 0,100% 14%,100% 100%,0 86%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{
  font-family:var(--font-title);
  font-weight:800;
  font-size:18.5px;
  letter-spacing:.05em;
  color:var(--c-fog);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.24em;
  color:var(--c-mist);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
  order:3;
  margin-left:auto;
}

.split-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--c-line);
  color:var(--c-mist);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.split-toggle:hover{color:var(--c-fog);border-color:var(--c-line-strong)}
.split-icon{
  display:block;
  width:14px;
  height:10px;
  background:linear-gradient(90deg,var(--c-violet) 0 42%,transparent 42% 58%,var(--c-violet) 58% 100%);
}
.site-header[data-split] .split-toggle{
  color:var(--c-cyan);
  border-color:rgba(46,242,214,.55);
  background:rgba(46,242,214,.08);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  border:1px solid var(--c-line-strong);
  color:var(--c-fog);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1.5px;
  background:currentColor;
  transition:transform .26s ease;
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.site-header[data-open] .nav-toggle-bars::before{transform:translateY(4px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

.site-nav{
  order:2;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:clamp(12px,1.6vw,26px);
  margin-left:auto;
  min-width:0;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.nav-list::-webkit-scrollbar{display:none}
.nav-list a{
  display:block;
  padding:9px 14px;
  border:1px solid transparent;
  color:var(--c-mist);
  font-size:14.5px;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.nav-list a:hover{
  color:var(--c-fog);
  border-color:var(--c-line);
}
.nav-list a[aria-current="page"]{
  color:var(--c-cyan);
  border-color:rgba(46,242,214,.6);
  background:rgba(46,242,214,.07);
}

.nav-quick{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.nav-quick-link{
  padding:8px 14px;
  border:1px solid var(--c-line);
  color:var(--c-fog);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  white-space:nowrap;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.nav-quick-link:hover{border-color:var(--c-line-strong)}
.nav-quick-link.is-primary{
  border-color:rgba(46,242,214,.65);
  color:var(--c-cyan);
}
.nav-quick-link.is-primary:hover{background:rgba(46,242,214,.12)}

.nav-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-cyan) 0%,var(--c-violet) 62%,var(--c-magenta) 100%);
  pointer-events:none;
  transition:transform .12s linear;
}

@media (min-width:900px){
  .site-header[data-split] .nav-list{
    display:grid;
    grid-template-columns:repeat(2,minmax(132px,1fr));
    column-gap:4px;
    row-gap:2px;
    padding-left:10px;
    border-left:1px solid var(--c-line);
  }
  .site-header[data-split] .nav-list a{text-align:left}
}

/* ===== 页脚 ===== */

.site-footer{
  margin-top:clamp(56px,8vw,110px);
  padding-top:clamp(40px,6vw,74px);
  background:var(--c-ink);
  border-top:1px solid var(--c-line);
  color:var(--c-fog);
}

.footer-shell{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1.5fr;
  gap:clamp(24px,3vw,48px);
  width:min(100% - 2 * var(--gap), var(--shell-w));
  margin-inline:auto;
  padding-bottom:clamp(32px,5vw,58px);
}

.footer-col{min-width:0}

.brand--footer{margin-bottom:16px}

.footer-icp{
  margin:0 0 8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--c-mist);
}

.footer-line{
  margin:0;
  font-size:14.5px;
  color:var(--c-mist);
}

.footer-title{
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--c-line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-cyan);
}

.footer-list li + li{margin-top:10px}
.footer-list a{
  color:var(--c-mist);
  font-size:15px;
}
.footer-list a:hover{color:var(--c-cyan)}

.footer-contact li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:baseline;
  gap:10px;
  padding:9px 0;
  border-bottom:1px solid rgba(138,160,201,.16);
}
.footer-contact li:first-child{padding-top:0}

.contact-key{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--c-mist);
  white-space:nowrap;
}
.contact-val{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  color:var(--c-fog);
  word-break:break-word;
}

.copy-btn{
  padding:3px 8px;
  border:1px solid rgba(46,242,214,.45);
  color:var(--c-cyan);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.copy-btn:hover{background:rgba(46,242,214,.12)}
.copy-btn[data-copied="true"]{background:var(--c-cyan);color:var(--c-ink);border-color:var(--c-cyan)}
.copy-btn[data-copied="false"]{border-color:rgba(232,69,139,.6);color:var(--c-magenta)}

.footer-note{
  margin:16px 0 0;
  font-size:14px;
  line-height:1.7;
  color:var(--c-mist);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  width:min(100% - 2 * var(--gap), var(--shell-w));
  margin-inline:auto;
  padding:20px 0 26px;
  border-top:1px solid rgba(138,160,201,.16);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--c-mist);
}
.footer-base p{margin:0}
.footer-base-meta{color:rgba(138,160,201,.7)}

/* ===== 返回顶部 ===== */

.to-top{
  position:fixed;
  right:var(--gap);
  bottom:var(--gap);
  z-index:80;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  background:rgba(7,11,30,.94);
  border:1px solid rgba(46,242,214,.6);
  color:var(--c-cyan);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;
}
.to-top[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}
.to-top:hover{background:rgba(46,242,214,.14)}
.to-top-arrow{
  display:block;
  width:11px;
  height:11px;
  border-left:1.5px solid currentColor;
  border-top:1.5px solid currentColor;
  transform:rotate(45deg) translate(2px,2px);
}

/* ===== 滚动显现与章节目录 ===== */

[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s ease,transform .6s ease;
}
[data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

[data-toc-link]{
  display:block;
  padding:8px 0 8px 14px;
  border-left:2px solid var(--c-line);
  color:var(--c-mist);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  transition:color .2s ease,border-color .2s ease,padding-left .2s ease;
}
[data-toc-link]:hover{color:var(--c-fog)}
[data-toc-link].is-active{
  color:var(--c-cyan);
  border-left-color:var(--c-cyan);
  padding-left:18px;
}

/* ===== 响应式 ===== */

@media (max-width:1100px){
  .footer-shell{grid-template-columns:1.3fr 1fr 1fr;}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:899px){
  :root{--header-h:64px}

  .header-shell{flex-wrap:nowrap}

  .brand-sub{display:none}
  .split-toggle{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    margin-left:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    background:rgba(7,11,30,.985);
    border-top:1px solid var(--c-line);
    border-bottom:1px solid var(--c-line);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .26s ease,transform .26s ease,visibility .26s ease;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gap) 0;
    overflow:visible;
  }
  .nav-list a{
    padding:15px 2px;
    border:0;
    border-bottom:1px solid var(--c-line);
    border-radius:0;
    font-size:16px;
    color:var(--c-fog);
  }
  .nav-list a[aria-current="page"]{
    background:transparent;
    border-bottom-color:var(--c-cyan);
    color:var(--c-cyan);
  }

  .nav-quick{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:18px var(--gap) 24px;
  }
  .nav-quick-link{text-align:center}

  .footer-shell{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:599px){
  .footer-shell{grid-template-columns:1fr}
  .footer-base{justify-content:flex-start}
  .to-top{width:42px;height:42px}
}

@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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
}