*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --color-ink:#0A1128;
  --color-ink-2:#102A43;
  --color-orange:#FF6B2C;
  --color-lime:#E8F14D;
  --color-paper:#F7F9FC;
  --color-fog:#AAB8C5;
  --color-line:#1E3A5A;
  --grad-orange:linear-gradient(135deg,#FF6B2C 0%,#E8F14D 100%);
  --grad-ink:linear-gradient(135deg,#0A1128 0%,#102A43 100%);
  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-data:"Roboto Mono","Fira Mono","Consolas",monospace;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --header-h:64px;
  --wrap:1200px;
  --space-1:.5rem;
  --space-2:1rem;
  --space-3:2rem;
  --space-4:3rem;
  --space-5:5rem;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --line-w:2px;
}

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}

body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--color-paper);
  background:var(--color-ink);
  padding-top:var(--header-h);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block}
a{color:var(--color-paper);text-decoration:none}
a:hover{color:var(--color-orange)}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.25;
  letter-spacing:-.02em;
  color:var(--color-paper);
  text-wrap:balance;
}
h1{font-size:clamp(40px,6vw,72px)}
h2{font-size:clamp(28px,4vw,40px)}
h3{font-size:24px}
p{text-wrap:pretty}

:focus-visible{
  outline:3px solid var(--color-lime);
  outline-offset:2px;
}
[hidden]{display:none !important}

.container{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--space-3);
}

.skip-link{
  position:fixed;
  top:-100%;
  left:16px;
  z-index:2000;
  padding:10px 20px;
  background:var(--color-orange);
  color:var(--color-ink);
  font-family:var(--font-body);
  font-weight:700;
  font-size:14px;
  transition:top .2s ease;
}
.skip-link:focus{
  top:12px;
  color:var(--color-ink);
}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:1000;
  height:var(--header-h);
  background:var(--grad-ink);
  border-bottom:var(--line-w) solid var(--color-line);
}

.header-inner{
  position:relative;
  height:100%;
  display:flex;
  align-items:center;
  gap:var(--space-3);
}

.brand{
  display:inline-flex;
  align-items:baseline;
  gap:3px;
  flex-shrink:0;
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.05em;
  color:var(--color-paper);
  line-height:1;
}
.brand-big{font-size:26px}
.brand-small{
  font-size:15px;
  color:var(--color-orange);
  letter-spacing:.08em;
  margin-left:2px;
}
.brand:hover .brand-big{color:var(--color-lime)}

.main-nav{
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  min-width:0;
}
.nav-head,.nav-foot{display:none}
.nav-list{
  display:flex;
  align-items:center;
  gap:0;
  flex-wrap:nowrap;
}
.nav-item{position:relative;list-style:none}
.nav-item + .nav-item::before{
  content:"/";
  font-family:var(--font-data);
  color:var(--color-line);
  font-size:13px;
  margin-inline:2px;
}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:6px;
  padding:8px 12px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--color-fog);
  border:1px solid transparent;
  transition:color .2s,background .2s,border-color .2s;
}
.nav-num{
  font-family:var(--font-data);
  font-size:11px;
  font-weight:400;
  color:var(--color-orange);
  letter-spacing:.05em;
}
.nav-link:hover{
  color:var(--color-paper);
  background:rgba(255,107,44,.08);
  border-color:transparent;
}
.nav-link[aria-current="page"]{
  color:var(--color-lime);
  background:rgba(232,241,77,.08);
  border-color:var(--color-line);
}
.nav-link[aria-current="page"] .nav-num{
  color:var(--color-lime);
}

.header-right{
  display:flex;
  align-items:center;
  gap:var(--space-2);
  flex-shrink:0;
}

.query-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 10px;
  background:var(--color-ink);
  border:1px solid var(--color-line);
  max-width:190px;
  width:100%;
  transition:border-color .2s;
}
.query-box:focus-within{
  border-color:var(--color-orange);
}
.query-label{
  font-family:var(--font-data);
  font-size:10px;
  letter-spacing:.08em;
  color:var(--color-fog);
  white-space:nowrap;
}
.query-input{
  width:100%;
  min-width:0;
  border:none;
  background:transparent;
  font-family:var(--font-data);
  font-size:12px;
  color:var(--color-paper);
  outline:none;
}
.query-input::placeholder{color:var(--color-fog)}
.query-input:focus{color:var(--color-lime)}

.nav-toggle{
  display:none;
  width:40px;
  height:36px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:var(--color-ink-2);
  border:1px solid var(--color-line);
  transition:border-color .2s;
}
.nav-toggle:hover{border-color:var(--color-orange)}
.toggle-line{
  display:block;
  width:18px;
  height:2px;
  background:var(--color-paper);
  transition:background .2s;
}
.nav-toggle:hover .toggle-line{background:var(--color-orange)}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:-2px;
  height:3px;
  width:0%;
  background:var(--grad-orange);
  z-index:3;
  transition:width .1s linear;
}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:1100;
  background:rgba(10,17,40,.75);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s ease;
}
.nav-scrim[data-open]{
  opacity:1;
  pointer-events:auto;
}

.page-main{
  min-height:60vh;
}
.section{
  padding-block:var(--space-5);
}
.section + .section{
  border-top:1px solid var(--color-line);
}

.site-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:var(--space-3);
}
.site-grid .span-4{grid-column:span 4}
.site-grid .span-6{grid-column:span 6}
.site-grid .span-8{grid-column:span 8}
.site-grid .span-12{grid-column:span 12}

.display-title{
  font-family:var(--font-display);
  font-weight:200;
  font-size:clamp(48px,7vw,96px);
  line-height:1.05;
  letter-spacing:-.03em;
  color:var(--color-paper);
  text-wrap:balance;
}
.text-data{
  font-family:var(--font-data);
  font-size:14px;
}
.coord{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--color-fog);
  text-transform:uppercase;
}
.coord b{
  color:var(--color-orange);
  font-weight:700;
}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  padding:12px 0;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--color-fog);
  border-bottom:1px solid var(--color-line);
  margin-bottom:var(--space-4);
}
.crumbs a{color:var(--color-fog)}
.crumbs a:hover{color:var(--color-orange)}
.crumbs .sep{color:var(--color-line)}
.crumbs [aria-current="page"]{color:var(--color-lime)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  font-size:14px;
  font-weight:700;
  font-family:var(--font-body);
  background:var(--color-ink-2);
  border:var(--line-w) solid var(--color-line);
  color:var(--color-paper);
  cursor:pointer;
  transition:transform .2s,box-shadow .2s,border-color .2s,background .2s;
}
.btn:hover{
  border-color:var(--color-orange);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
  color:var(--color-paper);
}
.btn-primary{
  background:var(--grad-orange);
  border-color:transparent;
  color:var(--color-ink);
  font-weight:900;
}
.btn-primary:hover{
  color:var(--color-ink);
  box-shadow:0 14px 28px rgba(255,107,44,.3);
}
.btn-ghost{
  background:transparent;
  border-color:var(--color-line);
  color:var(--color-fog);
}
.btn-ghost:hover{
  color:var(--color-paper);
  border-color:var(--color-orange);
}

.chapter{
  display:grid;
  grid-template-columns:72px 1fr;
  gap:var(--space-3);
  margin-bottom:var(--space-4);
  border-bottom:1px solid var(--color-line);
  padding-bottom:var(--space-3);
}
.chapter:last-child{border-bottom:none;margin-bottom:0}
.chapter-num{
  font-family:var(--font-data);
  font-size:40px;
  font-weight:700;
  line-height:1;
  color:var(--color-orange);
}
.chapter-body h3{margin-bottom:.75rem}
.chapter-body p{color:var(--color-fog);max-width:60em}

.card{
  display:block;
  background:var(--color-ink-2);
  border:var(--line-w) solid var(--color-line);
  padding:var(--space-3);
  box-shadow:0 4px 0 rgba(0,0,0,.3);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:rgba(255,107,44,.5);
}

.tag{
  display:inline-block;
  padding:3px 10px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.1em;
  background:rgba(232,241,77,.12);
  color:var(--color-lime);
  border:1px solid rgba(232,241,77,.35);
}
.tag-orange{
  background:rgba(255,107,44,.15);
  color:var(--color-orange);
  border-color:rgba(255,107,44,.4);
}

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  padding:14px 18px;
  border-left:var(--line-w) solid var(--color-orange);
  background:rgba(255,107,44,.06);
  font-size:13px;
  color:var(--color-fog);
}
.legend-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.legend-dot{
  width:10px;
  height:10px;
  background:var(--color-orange);
  flex-shrink:0;
}
.legend-dot--yellow{background:var(--color-lime)}
.legend-dot--ink{background:var(--color-ink-2);border:1px solid var(--color-line)}

.media{
  display:block;
  position:relative;
  overflow:hidden;
  background:var(--color-ink-2);
  border:var(--line-w) solid var(--color-line);
  aspect-ratio:16/9;
}
.media--tall{aspect-ratio:3/4}
.media--wide{aspect-ratio:16/7}
.media--square{aspect-ratio:1/1}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,transparent 55%,rgba(255,107,44,.28) 100%);
  pointer-events:none;
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media[data-label]::before{
  content:attr(data-label);
  position:absolute;
  left:10px;
  bottom:10px;
  z-index:2;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--color-lime);
  padding:4px 8px;
  background:rgba(10,17,40,.8);
  border:1px solid rgba(232,241,77,.35);
}

.table-data{
  width:100%;
  border-collapse:collapse;
  font-family:var(--font-data);
  font-size:13px;
  background:var(--color-ink-2);
  border:var(--line-w) solid var(--color-line);
}
.table-data th{
  text-align:left;
  padding:10px 14px;
  border-bottom:var(--line-w) solid var(--color-line);
  color:var(--color-orange);
  font-weight:700;
  background:rgba(255,107,44,.05);
  white-space:nowrap;
}
.table-data td{
  padding:10px 14px;
  border-bottom:1px solid var(--color-line);
  color:var(--color-paper);
}
.table-data tr:last-child td{border-bottom:none}

.callout{
  border-left:4px solid var(--color-orange);
  background:rgba(255,107,44,.08);
  padding:var(--space-2) var(--space-3);
  margin-block:var(--space-2);
  font-size:14px;
  color:var(--color-fog);
}

.filter-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 18px;
  border:var(--line-w) solid var(--color-line);
  background:var(--color-ink-2);
  color:var(--color-fog);
  font-size:13px;
  font-weight:700;
  transition:background .2s,color .2s,border-color .2s,transform .2s;
}
.filter-btn:hover{
  border-color:var(--color-orange);
  color:var(--color-paper);
  transform:translateY(-1px);
}
.filter-btn.is-active,
.filter-btn[aria-pressed="true"]{
  background:var(--grad-orange);
  border-color:transparent;
  color:var(--color-ink);
}
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}
[data-filter-item]{
  animation:fadeInUp .2s ease both;
}
[data-version-block]{
  transition:opacity .15s;
}

[data-reveal]{
  opacity:0;
  transform:translateX(24px);
  transition:opacity .2s ease,transform .2s ease;
}
[data-reveal].is-visible{
  opacity:1;
  transform:translateX(0);
}

.site-footer{
  margin-top:var(--space-5);
  background:var(--grad-ink);
  border-top:var(--line-w) solid var(--color-line);
}
.footer-top{
  display:grid;
  grid-template-columns:1.1fr 2fr;
  gap:var(--space-4);
  padding-block:var(--space-5) var(--space-4);
}
.footer-brand{max-width:38em}
.footer-logo{
  display:inline-flex;
  gap:4px;
  align-items:baseline;
  font-family:var(--font-display);
  font-weight:900;
  font-size:28px;
  letter-spacing:-.03em;
  color:var(--color-paper);
}
.logo-accent{color:var(--color-orange)}
.footer-desc{
  color:var(--color-fog);
  font-size:14px;
  line-height:1.8;
  margin-top:14px;
}
.trust-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:18px;
  padding:6px 14px;
  background:rgba(255,107,44,.1);
  border:1px solid rgba(255,107,44,.3);
  font-size:12px;
  color:var(--color-orange);
  letter-spacing:.02em;
}
.badge-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--color-orange);
  flex-shrink:0;
}
.footer-links{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--space-3);
}
.footer-col h3{
  font-size:13px;
  font-family:var(--font-data);
  font-weight:700;
  color:var(--color-lime);
  letter-spacing:.15em;
  text-transform:uppercase;
  margin-bottom:14px;
}
.footer-list li{margin-bottom:10px}
.footer-list a{
  color:var(--color-fog);
  font-size:14px;
  transition:color .2s;
}
.footer-list a:hover{color:var(--color-orange)}
.contact-list li{
  font-size:13px;
  color:var(--color-paper);
  line-height:1.5;
  margin-bottom:14px;
}
.meta-label{
  display:block;
  font-family:var(--font-data);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--color-fog);
  margin-bottom:2px;
  text-transform:uppercase;
}
.footer-bottom{
  border-top:var(--line-w) solid var(--color-line);
  padding-block:16px;
}
.footer-bottom-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-family:var(--font-data);
  font-size:12px;
  color:var(--color-fog);
}

@media (max-width: 992px){
  .nav-toggle{
    display:inline-flex;
  }
  .header-inner{
    gap:var(--space-2);
  }
  .header-right{
    margin-left:auto;
  }
  .query-box{
    max-width:140px;
  }
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:1200;
    width:320px;
    max-width:85vw;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    padding:var(--space-3);
    background:var(--color-ink-2);
    border-left:var(--line-w) solid var(--color-orange);
    transform:translateX(110%);
    visibility:hidden;
    opacity:0;
    transition:transform .3s ease,visibility .3s,opacity .3s;
    box-shadow:var(--shadow);
  }
  .main-nav[data-open]{
    transform:translateX(0);
    visibility:visible;
    opacity:1;
  }
  .nav-head{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:var(--space-3);
    padding-bottom:var(--space-2);
    border-bottom:1px solid var(--color-line);
  }
  .nav-index{
    font-family:var(--font-data);
    font-size:12px;
    letter-spacing:.15em;
    color:var(--color-fog);
  }
  .nav-close{
    width:32px;
    height:32px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:20px;
    line-height:1;
    color:var(--color-lime);
    border:1px solid var(--color-line);
    background:var(--color-ink);
    transition:border-color .2s;
  }
  .nav-close:hover{border-color:var(--color-orange)}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-item + .nav-item::before{display:none}
  .nav-link{
    padding:12px 10px;
    font-size:15px;
    border-bottom:1px solid var(--color-line);
    justify-content:flex-start;
  }
  .nav-link:hover{
    background:rgba(255,107,44,.08);
  }
  .nav-foot{
    display:flex;
    gap:18px;
    margin-top:auto;
    padding-top:var(--space-2);
    border-top:1px solid var(--color-line);
  }
  .nav-foot a{
    font-size:12px;
    color:var(--color-fog);
    transition:color .2s;
  }
  .nav-foot a:hover{color:var(--color-orange)}
}

@media (max-width: 768px){
  :root{
    --header-h:56px;
  }
  .container{
    padding-inline:1rem;
  }
  .header-inner{
    gap:10px;
  }
  .brand-big{font-size:22px}
  .brand-small{font-size:13px}
  .query-box{
    max-width:110px;
    height:32px;
    padding:0 8px;
  }
  .query-label{
    font-size:9px;
  }
  .query-input{
    font-size:11px;
  }
  .section{
    padding-block:var(--space-4);
  }
  .site-grid{
    gap:var(--space-2);
  }
  .site-grid .span-4,
  .site-grid .span-6,
  .site-grid .span-8,
  .site-grid .span-12{
    grid-column:span 12;
  }
  .chapter{
    grid-template-columns:44px 1fr;
    gap:var(--space-2);
    padding-bottom:var(--space-2);
  }
  .chapter-num{
    font-size:28px;
  }
  .card{
    padding:var(--space-2);
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:var(--space-3);
    padding-block:var(--space-4) var(--space-3);
  }
  .footer-links{
    grid-template-columns:1fr 1fr;
    gap:var(--space-2);
  }
  .footer-bottom-inner{
    flex-direction:column;
    text-align:center;
  }
}

@media (max-width: 480px){
  .query-label{
    display:none;
  }
  .query-box{
    max-width:96px;
  }
  .footer-links{
    grid-template-columns:1fr;
  }
}

@media (min-width: 993px){
  .nav-scrim{
    display:none !important;
  }
}

@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;
  }
  [data-reveal]{
    opacity:1;
    transform:none;
  }
  .scroll-progress{
    transition:none;
  }
  .main-nav{
    transition:none;
  }
}