:root{
  --brand-blue:#00E5FF;
  --ink-black:#0B0B0D;
  --panel-dark:#16181D;
  --border-dim:#262B31;
  --paper-white:#F2F2F0;
  --text-white:#EDEDED;
  --text-soft:#A0A5AD;
  --text-black:#111111;
  --glow-blue-tint:rgba(0,229,255,0.10);
  --alert-pink:#FF2A6D;
  --display:Impact,'Arial Black',sans-serif;
  --body:'Microsoft YaHei','Source Han Sans SC',sans-serif;
  --mono:Consolas,'Courier New',monospace;
  --max-width:1200px;
  --radius:18px;
  --radius-sm:10px;
  --transition:0.3s ease;
  --header-h:80px;
  --shadow-blue:0 0 24px rgba(0,229,255,0.15);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--ink-black);
  color:var(--text-white);
  font-family:var(--body);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-blue);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--text-white)}
button{font-family:var(--body);cursor:pointer}
ul,ol{list-style:none}
:focus-visible{
  outline:3px solid var(--brand-blue);
  outline-offset:3px;
  border-radius:4px;
}
.container{
  width:100%;
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 24px;
}
.skip-link{
  position:fixed;
  top:-60px;
  left:16px;
  z-index:2000;
  background:var(--brand-blue);
  color:var(--text-black);
  font-weight:700;
  padding:10px 20px;
  border-radius:0 0 8px 8px;
  transition:top var(--transition);
}
.skip-link:focus{top:0;color:var(--text-black)}

/* ===== Header ===== */
.site-header{
  background:rgba(11,11,13,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-dim);
  position:sticky;
  top:0;
  z-index:1000;
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  min-height:var(--header-h);
  position:relative;
}
.header-brand{
  justify-self:start;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:12px;
}
.brand-logo{
  font-family:var(--display);
  font-size:1.9rem;
  letter-spacing:0.02em;
  color:var(--ink-black);
  background:var(--brand-blue);
  padding:4px 10px;
  border-radius:8px;
  box-shadow:var(--shadow-blue);
  line-height:1.2;
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.25;
}
.brand-text strong{
  color:var(--text-white);
  font-size:0.95rem;
  letter-spacing:0.06em;
}
.brand-text small{
  color:var(--text-soft);
  font-size:0.72rem;
  letter-spacing:0.04em;
}
.header-nav{
  justify-self:center;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-list a{
  color:var(--text-soft);
  font-size:0.85rem;
  font-weight:500;
  letter-spacing:0.05em;
  padding:8px 14px;
  border-radius:999px;
  transition:color var(--transition),background var(--transition);
}
.nav-list a:hover{
  color:var(--text-white);
  background:var(--panel-dark);
}
.nav-list a[aria-current="page"]{
  color:var(--brand-blue);
  background:var(--glow-blue-tint);
  box-shadow:inset 0 0 0 1px rgba(0,229,255,0.25);
}
.header-actions{
  justify-self:end;
  display:flex;
  gap:10px;
}
.header-action-link{
  color:var(--text-white);
  font-size:0.82rem;
  border:1px solid var(--border-dim);
  border-radius:999px;
  padding:7px 16px;
  transition:all var(--transition);
}
.header-action-link:hover{
  border-color:var(--brand-blue);
  color:var(--brand-blue);
  box-shadow:var(--shadow-blue);
}
.header-action-highlight{
  background:var(--brand-blue);
  border-color:var(--brand-blue);
  color:var(--text-black);
  font-weight:700;
}
.header-action-highlight:hover{
  background:transparent;
  color:var(--brand-blue);
}
.nav-toggle{
  display:none;
  background:transparent;
  border:1px solid var(--border-dim);
  width:44px;
  height:44px;
  border-radius:12px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  transition:border-color var(--transition);
}
.nav-toggle:hover{border-color:var(--brand-blue)}
.nav-toggle-line{
  display:block;
  width:20px;
  height:2px;
  background:var(--text-white);
  border-radius:2px;
  transition:transform var(--transition),opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.header-rule{
  height:2px;
  background:linear-gradient(90deg,var(--brand-blue) 0%,transparent 40%,transparent 60%,var(--brand-blue) 100%);
  opacity:0.5;
}

/* ===== Footer ===== */
.site-footer{
  background:var(--panel-dark);
  border-top:1px solid var(--border-dim);
  margin-top:80px;
  position:relative;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,var(--brand-blue),transparent 30%,transparent 70%,var(--brand-blue));
}
.footer-main{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:48px;
  padding:56px 24px 40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer-logo{
  font-family:var(--display);
  font-size:1.6rem;
  background:var(--brand-blue);
  color:var(--text-black);
  padding:3px 8px;
  border-radius:6px;
}
.footer-brands{
  font-family:var(--display);
  font-size:1.1rem;
  letter-spacing:0.06em;
  color:var(--text-white);
}
.footer-about{
  color:var(--text-soft);
  font-size:0.88rem;
  line-height:1.8;
  max-width:360px;
}
.footer-title{
  font-size:0.78rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--text-soft);
  margin-bottom:18px;
  font-weight:600;
}
.footer-contact-list li{
  color:var(--text-white);
  margin-bottom:10px;
  font-size:0.87rem;
}
.footer-contact-list a{
  color:var(--text-white);
  border-bottom:1px solid var(--border-dim);
  padding-bottom:2px;
}
.footer-contact-list a:hover{
  color:var(--brand-blue);
  border-color:var(--brand-blue);
}
.footer-nav-list{
  display:flex;
  flex-wrap:wrap;
  gap:6px 18px;
  margin-bottom:20px;
}
.footer-nav-list a,.footer-legal-list a{
  color:var(--text-soft);
  font-size:0.85rem;
}
.footer-nav-list a:hover,.footer-legal-list a:hover{
  color:var(--brand-blue);
}
.footer-legal-list{
  display:flex;
  gap:18px;
  border-top:1px solid var(--border-dim);
  padding-top:16px;
}
.footer-bottom{
  background:var(--ink-black);
  border-top:1px solid var(--border-dim);
}
.footer-bottom-inner{
  display:flex;
  justify-content:space-between;
  padding-top:16px;
  padding-bottom:16px;
  color:var(--text-soft);
  font-size:0.78rem;
}
.back-to-top{
  position:fixed;
  right:24px;
  bottom:88px;
  width:44px;
  height:44px;
  border-radius:50%;
  background:var(--brand-blue);
  color:var(--text-black);
  font-size:1.2rem;
  border:none;
  opacity:0;
  pointer-events:none;
  transition:opacity var(--transition),transform var(--transition),box-shadow var(--transition);
  z-index:980;
  box-shadow:var(--shadow-blue);
}
.back-to-top.visible{
  opacity:1;
  pointer-events:auto;
}
.back-to-top:hover{
  transform:translateY(-3px);
  box-shadow:0 0 30px rgba(0,229,255,0.35);
}

/* ===== Shared Components ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 24px;
  border-radius:999px;
  font-size:0.88rem;
  font-weight:600;
  letter-spacing:0.04em;
  border:1px solid transparent;
  transition:all var(--transition);
}
.btn-primary{
  background:var(--brand-blue);
  color:var(--text-black);
  box-shadow:var(--shadow-blue);
}
.btn-primary:hover{
  background:transparent;
  color:var(--brand-blue);
  border-color:var(--brand-blue);
  transform:translateY(-1px);
}
.btn-outline{
  border-color:var(--border-dim);
  color:var(--text-white);
  background:transparent;
}
.btn-outline:hover{
  border-color:var(--brand-blue);
  color:var(--brand-blue);
}
.tag{
  display:inline-block;
  font-size:0.7rem;
  font-weight:600;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--brand-blue);
  border:1px solid rgba(0,229,255,0.3);
  border-radius:999px;
  padding:3px 12px;
  background:rgba(0,229,255,0.06);
}
.tag-pink{
  color:var(--alert-pink);
  border-color:rgba(255,42,109,0.3);
  background:rgba(255,42,109,0.06);
}
.tag-dark{
  color:var(--text-soft);
  border-color:var(--border-dim);
  background:transparent;
}
.section-title{
  margin-bottom:32px;
}
.section-index{
  display:block;
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.24em;
  color:var(--text-soft);
  margin-bottom:8px;
  text-transform:uppercase;
}
.section-title h2{
  font-family:var(--display);
  font-weight:700;
  font-size:2.8rem;
  line-height:1.1;
  letter-spacing:0.01em;
  text-transform:uppercase;
  color:var(--text-white);
}
.section-title h2 em{
  font-style:normal;
  color:var(--brand-blue);
}
.section-title p{
  color:var(--text-soft);
  font-size:0.92rem;
  max-width:720px;
  margin-top:12px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:0.82rem;
  color:var(--text-soft);
  margin-bottom:32px;
}
.breadcrumb .crumb{
  color:var(--text-soft);
}
.breadcrumb .crumb:hover{
  color:var(--brand-blue);
}
.breadcrumb .crumb[aria-current="page"]{
  color:var(--text-white);
}
.breadcrumb-sep{
  color:var(--border-dim);
}
.article-body{
  max-width:760px;
  margin:0 auto;
}
.article-body p{
  color:var(--text-soft);
  font-size:0.95rem;
  margin-bottom:20px;
  line-height:1.9;
}
.article-body h2{
  color:var(--text-white);
  font-family:var(--display);
  font-size:1.8rem;
  margin:48px 0 16px;
}
.article-body h3{
  color:var(--text-white);
  font-size:1.05rem;
  margin:32px 0 12px;
}
.article-body a{
  border-bottom:1px solid rgba(0,229,255,0.3);
}
.glow-border{
  border:1px solid transparent;
  position:relative;
}
.glow-border{
  border-color:rgba(0,229,255,0.15);
  box-shadow:0 0 30px rgba(0,229,255,0.08);
}

/* ===== Bento Grid ===== */
.bento-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:20px;
}
.bento-card{
  background:var(--panel-dark);
  border-radius:var(--radius);
  border:1px solid var(--border-dim);
  padding:28px;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
  position:relative;
  overflow:hidden;
}
.bento-card::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:var(--radius);
  pointer-events:none;
  box-shadow:inset 0 0 40px transparent;
  transition:box-shadow var(--transition);
}
.bento-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,229,255,0.4);
  box-shadow:0 12px 40px rgba(0,0,0,0.35),var(--shadow-blue);
}
.bento-card:hover::after{
  box-shadow:inset 0 0 60px rgba(0,229,255,0.05);
}
.bento-card .card-index{
  font-family:var(--mono);
  font-size:0.68rem;
  color:var(--text-soft);
  letter-spacing:0.18em;
  text-transform:uppercase;
  display:block;
  margin-bottom:12px;
}
.bento-card h3{
  font-family:var(--display);
  font-size:1.55rem;
  color:var(--text-white);
  line-height:1.15;
  margin-bottom:12px;
  letter-spacing:0.02em;
}
.bento-card h3 a{
  color:var(--text-white);
}
.bento-card h3 a:hover{
  color:var(--brand-blue);
}
.bento-card p{
  color:var(--text-soft);
  font-size:0.88rem;
  margin-bottom:16px;
}
.bento-card .card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand-blue);
  font-size:0.84rem;
  font-weight:600;
}
.bento-card .card-link::after{
  content:"→";
  transition:transform var(--transition);
}
.bento-card .card-link:hover::after{
  transform:translateX(4px);
}
.size-1{grid-column:span 4}
.size-2{grid-column:span 5}
.size-3{grid-column:span 7}
.size-4{grid-column:span 6}
.size-5{grid-column:span 8}
.size-6{grid-column:span 12}
.size-7{grid-column:span 3}
.card-accent{
  border-top:3px solid var(--brand-blue);
}
.card-white{
  background:var(--paper-white);
  color:var(--text-black);
}
.card-white h3,.card-white .card-index{
  color:var(--text-black);
}
.card-white p{
  color:#444444;
}
.card-white:hover{
  border-color:var(--brand-blue);
}

/* ===== Theme Filter ===== */
.theme-filter{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:24px 0 32px;
}
.filter-btn{
  background:transparent;
  border:1px solid var(--border-dim);
  border-radius:999px;
  color:var(--text-soft);
  padding:8px 20px;
  font-size:0.82rem;
  font-weight:500;
  transition:all var(--transition);
}
.filter-btn:hover{
  border-color:var(--brand-blue);
  color:var(--brand-blue);
}
.filter-btn[aria-pressed="true"]{
  background:var(--brand-blue);
  border-color:var(--brand-blue);
  color:var(--text-black);
  font-weight:700;
  box-shadow:var(--shadow-blue);
}

/* ===== Pic Frame ===== */
.pic-frame{
  position:relative;
  border-radius:var(--radius);
  background:linear-gradient(135deg,#12141A 0%,#1E2229 50%,#12141A 100%);
  border:1px solid var(--border-dim);
  overflow:hidden;
  min-height:160px;
}
.pic-frame::before{
  content:"";
  display:block;
  padding-bottom:62%;
}
.pic-frame img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.pic-frame .placeholder-label{
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  color:var(--text-soft);
  font-size:0.72rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  white-space:nowrap;
}
.pic-frame-blue{
  border-color:rgba(0,229,255,0.35);
  box-shadow:var(--shadow-blue);
}

/* ===== Node Path ===== */
.node-path{
  display:flex;
  flex-direction:column;
  gap:0;
  counter-reset:node;
}
.node-item{
  position:relative;
  padding:0 0 28px 36px;
}
.node-item::before{
  counter-increment:node;
  content:counter(node,decimal-leading-zero);
  position:absolute;
  left:0;
  top:2px;
  width:24px;
  height:24px;
  border-radius:50%;
  background:var(--brand-blue);
  color:var(--text-black);
  font-family:var(--mono);
  font-size:0.68rem;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
}
.node-item::after{
  content:"";
  position:absolute;
  left:11px;
  top:30px;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--brand-blue),transparent);
  opacity:0.5;
}
.node-item:last-child::after{
  display:none;
}
.node-item h4{
  color:var(--text-white);
  font-size:0.96rem;
  margin-bottom:4px;
}
.node-item p{
  color:var(--text-soft);
  font-size:0.84rem;
}
.node-item em{
  font-style:normal;
  color:var(--brand-blue);
  font-family:var(--mono);
  font-size:0.8rem;
}

/* ===== Expand ===== */
.expand-item{
  border:1px solid var(--border-dim);
  border-radius:var(--radius-sm);
  background:var(--panel-dark);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--transition);
}
.expand-item:hover{
  border-color:rgba(0,229,255,0.35);
}
.expand-head{
  width:100%;
  background:transparent;
  border:none;
  padding:18px 22px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  color:var(--text-white);
  text-align:left;
  font-size:0.95rem;
  font-weight:600;
}
.expand-head .expand-icon{
  flex-shrink:0;
  color:var(--brand-blue);
  font-size:1.1rem;
  transition:transform var(--transition);
}
.expand-item[data-open] .expand-icon{
  transform:rotate(45deg);
}
.expand-body{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.4s ease;
}
.expand-body-inner{
  padding:0 22px 20px;
  color:var(--text-soft);
  font-size:0.88rem;
  line-height:1.8;
}

/* ===== Archives Panel ===== */
.archives-panel{
  position:fixed;
  right:20px;
  top:50%;
  transform:translateY(-50%);
  z-index:990;
  width:72px;
  transition:width var(--transition);
}
.archives-panel[data-open]{
  width:270px;
}
.archives-toggle{
  width:100%;
  background:var(--brand-blue);
  color:var(--text-black);
  border:none;
  border-radius:16px;
  padding:12px 10px;
  font-weight:700;
  font-size:0.75rem;
  letter-spacing:0.08em;
  box-shadow:var(--shadow-blue);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  transition:all var(--transition);
}
.archives-toggle:hover{
  transform:translateX(-4px);
}
.archives-body{
  margin-top:12px;
  background:rgba(22,24,29,0.96);
  backdrop-filter:blur(10px);
  border:1px solid rgba(0,229,255,0.2);
  border-radius:16px;
  padding:18px;
  opacity:0;
  pointer-events:none;
  transform:translateX(20px);
  transition:opacity var(--transition),transform var(--transition);
  max-height:70vh;
  overflow-y:auto;
}
.archives-panel[data-open] .archives-body{
  opacity:1;
  pointer-events:auto;
  transform:translateX(0);
}
.archives-body h3{
  color:var(--brand-blue);
  font-size:0.75rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  margin-bottom:14px;
  border-bottom:1px solid var(--border-dim);
  padding-bottom:10px;
}
.archives-list{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.archives-list a{
  color:var(--text-soft);
  font-size:0.82rem;
  padding:6px 10px;
  border-radius:8px;
  transition:background var(--transition),color var(--transition);
}
.archives-list a:hover{
  background:rgba(0,229,255,0.08);
  color:var(--brand-blue);
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .bento-grid{gap:16px}
  .size-1,.size-7{grid-column:span 6}
  .size-2,.size-4{grid-column:span 6}
  .size-3,.size-5{grid-column:span 12}
  .footer-main{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
  .archives-panel{
    display:none;
  }
}
@media (max-width:768px){
  .header-inner{
    grid-template-columns:1fr auto;
    min-height:66px;
  }
  .header-nav{
    position:fixed;
    top:66px;
    left:0;
    right:0;
    background:rgba(11,11,13,0.98);
    border-bottom:1px solid var(--border-dim);
    padding:0 20px;
    max-height:0;
    overflow:hidden;
    transition:max-height 0.4s ease,padding 0.4s ease;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .header-nav[data-open]{
    max-height:420px;
    padding:18px 20px 24px;
    box-shadow:0 20px 40px rgba(0,0,0,0.4);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-list a{
    display:block;
    padding:13px 16px;
    font-size:0.92rem;
    border-radius:10px;
  }
  .nav-toggle{
    display:flex;
  }
  .header-actions{
    display:none;
  }
  .footer-main{
    grid-template-columns:1fr;
    gap:28px;
    padding-top:40px;
  }
  .footer-bottom-inner{
    flex-direction:column;
    gap:6px;
  }
  .back-to-top{
    right:16px;
    bottom:60px;
    width:40px;
    height:40px;
  }
  .section-title h2{
    font-size:2rem;
  }
  .bento-grid{
    grid-template-columns:1fr;
  }
  .size-1,.size-2,.size-3,.size-4,.size-5,.size-6,.size-7{
    grid-column:1;
  }
  .bento-card{
    padding:22px;
  }
  .theme-filter{
    flex-wrap:nowrap;
    overflow-x:auto;
    padding-bottom:8px;
    scrollbar-width:thin;
  }
  .filter-btn{
    flex-shrink:0;
  }
}
@media (max-width:480px){
  .container{
    padding:0 16px;
  }
  .brand-text small{
    display:none;
  }
  .brand-logo{
    font-size:1.6rem;
  }
  .section-title h2{
    font-size:1.7rem;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
    scroll-behavior:auto !important;
  }
  .back-to-top{
    transition:opacity 0.01ms ease;
  }
}