:root{
  --ink:#0B1220;
  --indigo:#17233F;
  --lamp:#F5B84B;
  --glow:#FFE9B0;
  --cyan:#35D6C8;
  --brick:#B8543B;
  --paper:#F6EBDC;
  --gray:#6B7280;
  --line:#A8B0BD;
  --text-dark:#12161F;
  --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"DIN Alternate","Roboto Condensed","Arial Narrow",sans-serif;
  --wrap:1180px;
  --radius:18px;
  --radius-sm:10px;
  --lamp-shadow:0 0 24px rgba(245,184,75,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{margin:0;padding:0;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(680px 420px at 12% -8%, rgba(245,184,75,.10), transparent 70%),
    radial-gradient(560px 420px at 92% 12%, rgba(53,214,200,.07), transparent 70%),
    radial-gradient(700px 500px at 50% 120%, rgba(23,35,63,.85), transparent 75%);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;}
a{color:inherit;}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  line-height:1.22;
  letter-spacing:-.01em;
  margin:0 0 .5em;
}
h1{font-size:clamp(2.25rem,5vw,4.5rem);}
h2{font-size:clamp(1.75rem,3.4vw,2.75rem);}
h3{font-size:clamp(1.25rem,2vw,1.75rem);}
p{margin:0 0 1.1em;}
ul,ol{margin:0 0 1.1em;padding-left:1.2em;}
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}
.sr-only{
  position:absolute!important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;
  left:16px;top:-64px;
  z-index:200;
  padding:10px 16px;
  background:var(--lamp);
  color:var(--ink);
  font-weight:700;
  text-decoration:none;
  border-radius:0 0 12px 12px;
  transition:top .25s var(--ease);
}
.skip-link:focus{top:0;}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(11,18,32,.97),rgba(11,18,32,.88));
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(168,176,189,.18);
  color:var(--paper);
}
.read-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(168,176,189,.14);
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--lamp),var(--cyan));
  box-shadow:0 0 12px rgba(245,184,75,.55);
  transition:width .12s linear;
}
.header-inner{
  width:min(var(--wrap),calc(100% - 40px));
  margin:0 auto;
}
.header-masthead{
  display:flex;
  align-items:center;
  gap:18px;
  padding:14px 0 10px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:inherit;
}
.brand-mark{
  width:14px;height:14px;
  border-radius:50%;
  background:var(--lamp);
  box-shadow:0 0 0 4px rgba(245,184,75,.16),0 0 22px rgba(245,184,75,.85);
  flex:none;
}
.brand-text{display:flex;flex-direction:column;}
.brand-name{
  font-family:var(--font-head);
  font-weight:900;
  font-size:20px;
  letter-spacing:.04em;
  line-height:1.3;
}
.brand-note{
  font-size:12px;
  letter-spacing:.18em;
  color:var(--line);
}
.header-meta{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--line);
}
.header-meta__dot{
  width:4px;height:4px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,214,200,.9);
  flex:none;
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;height:40px;
  padding:0 9px;
  background:rgba(245,184,75,.08);
  border:1px solid rgba(245,184,75,.4);
  border-radius:12px;
  cursor:pointer;
}
.nav-toggle__bar{
  display:block;
  width:100%;height:2px;
  background:var(--lamp);
  border-radius:2px;
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.nav-bar{
  border-top:1px solid rgba(168,176,189,.14);
  padding:8px 0 12px;
}
.nav-list{
  list-style:none;
  margin:0;padding:0;
  display:flex;
  align-items:stretch;
  gap:clamp(4px,1.6vw,20px);
  counter-reset:lamp 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-list::-webkit-scrollbar{display:none;}
.nav-item{
  counter-increment:lamp 1;
  position:relative;
  display:flex;
  flex:none;
}
.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:1px;
  padding:8px 12px 12px;
  color:var(--paper);
  text-decoration:none;
  border-radius:12px 12px 4px 4px;
  transition:color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-index{
  font-family:var(--font-num);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--lamp);
  opacity:.85;
}
.nav-index::before{content:counter(lamp,decimal-leading-zero);}
.nav-label{font-size:15px;white-space:nowrap;}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--lamp),transparent);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .3s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible{
  color:var(--glow);
  background:rgba(245,184,75,.08);
}
.nav-link:hover .nav-index{color:var(--cyan);}
.nav-link:hover::after,
.nav-link:focus-visible::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{
  color:var(--ink);
  background:var(--lamp);
  box-shadow:0 10px 26px rgba(245,184,75,.24);
}
.nav-link[aria-current="page"] .nav-index{color:rgba(11,18,32,.68);}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:rgba(11,18,32,.35);
}
.header-contact{
  position:fixed;
  right:0;
  top:50%;
  transform:translateY(-50%);
  z-index:90;
}
.header-contact__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  padding:16px 9px;
  background:linear-gradient(180deg,rgba(23,35,63,.94),rgba(11,18,32,.94));
  border:1px solid rgba(245,184,75,.4);
  border-right:0;
  border-radius:14px 0 0 14px;
  color:var(--paper);
  text-decoration:none;
  font-size:12px;
  letter-spacing:.26em;
  backdrop-filter:blur(8px);
  transition:color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.header-contact__lamp{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--lamp);
  box-shadow:0 0 18px rgba(245,184,75,.95);
  flex:none;
}
.header-contact__text{writing-mode:vertical-rl;}
.header-contact__link:hover,
.header-contact__link:focus-visible{
  color:var(--cyan);
  border-color:var(--cyan);
  box-shadow:-6px 0 24px rgba(53,214,200,.22);
}

/* generic layout */
.container{
  width:min(var(--wrap),calc(100% - 40px));
  margin:0 auto;
}
.section{padding:clamp(48px,8vw,104px) 0;}
.section--paper{
  background:var(--paper);
  color:var(--text-dark);
}
.section--indigo{
  background:linear-gradient(160deg,var(--indigo),rgba(11,18,32,.98));
}
.grid{display:grid;gap:clamp(20px,3vw,40px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.stack{display:flex;flex-direction:column;gap:18px;}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.28em;
  color:var(--lamp);
  text-transform:uppercase;
  margin:0 0 .8em;
}
.lede{
  font-size:clamp(1.05rem,1.5vw,1.25rem);
  line-height:1.85;
  color:var(--line);
  max-width:62ch;
}
.prose{max-width:68ch;}
.prose p{line-height:1.85;}
.prose h2{margin-top:1.6em;}
.prose h3{margin-top:1.3em;}
.prose a{color:var(--cyan);text-underline-offset:3px;}
.note{
  font-size:13.5px;
  color:var(--gray);
  letter-spacing:.04em;
}
.panel{
  padding:clamp(20px,3vw,32px);
  border:1px solid rgba(168,176,189,.22);
  border-radius:var(--radius);
  background:rgba(23,35,63,.55);
}
.panel--paper{
  background:var(--paper);
  color:var(--text-dark);
  border-color:rgba(18,22,31,.12);
}
.panel--glow{
  border-color:rgba(245,184,75,.45);
  box-shadow:0 0 40px rgba(245,184,75,.12) inset,0 18px 40px rgba(0,0,0,.28);
}
.aside-card{
  padding:18px 20px;
  border-left:3px solid var(--lamp);
  background:rgba(245,184,75,.07);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:14.5px;
  color:var(--line);
}
.lamp-rule{
  height:1px;
  border:0;
  margin:clamp(28px,5vw,56px) 0;
  background:linear-gradient(90deg,transparent,rgba(245,184,75,.7),transparent);
}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--cyan);
  text-decoration:none;
  font-size:14.5px;
  letter-spacing:.06em;
}
.link-arrow::after{content:"→";transition:transform .25s var(--ease);}
.link-arrow:hover::after{transform:translateX(4px);}
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.12em;
  font-family:var(--font-num);
  border:1px solid currentColor;
}
.tag--brick{color:var(--brick);}
.tag--cyan{color:var(--cyan);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  letter-spacing:.08em;
  text-decoration:none;
  cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn--lamp{
  background:var(--lamp);
  color:var(--ink);
  box-shadow:0 10px 26px rgba(245,184,75,.26);
}
.btn--lamp:hover{background:var(--glow);}
.btn--ghost{
  border-color:rgba(245,184,75,.55);
  color:var(--lamp);
}
.btn--ghost:hover{background:rgba(245,184,75,.12);color:var(--glow);}
.btn--cyan{
  border-color:rgba(53,214,200,.6);
  color:var(--cyan);
}
.btn--cyan:hover{background:rgba(53,214,200,.12);}
.breadcrumbs{margin:0 0 clamp(20px,3vw,32px);}
.breadcrumbs__list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;padding:0;
  font-size:13px;
  color:var(--gray);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumbs__link{color:var(--line);text-decoration:none;}
.breadcrumbs__link:hover{color:var(--cyan);}
.breadcrumbs__sep{color:rgba(168,176,189,.5);}
.media{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--indigo),rgba(11,18,32,.96));
  isolation:isolate;
}
.media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--portrait{aspect-ratio:3/4;}
.media--glow::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:60%;
  background:linear-gradient(180deg,transparent,rgba(245,184,75,.16));
  pointer-events:none;
}
.media__caption{
  margin:10px 2px 0;
  font-size:13px;
  color:var(--gray);
  letter-spacing:.04em;
}
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* footer */
.site-footer{
  background:linear-gradient(180deg,var(--indigo),var(--ink));
  color:var(--paper);
  border-top:1px solid rgba(245,184,75,.28);
  box-shadow:0 -18px 50px rgba(0,0,0,.35);
  padding:clamp(40px,6vw,72px) 0 0;
}
.footer-inner{
  width:min(var(--wrap),calc(100% - 40px));
  margin:0 auto;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,2.2fr);
  gap:clamp(28px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:10px;}
.footer-brand__mark{
  width:12px;height:12px;
  border-radius:50%;
  background:var(--lamp);
  box-shadow:0 0 0 4px rgba(245,184,75,.14),0 0 22px rgba(245,184,75,.85);
}
.footer-brand__name{
  font-family:var(--font-head);
  font-weight:900;
  font-size:20px;
  letter-spacing:.05em;
}
.footer-brand__line{
  margin:0;
  max-width:26ch;
  font-size:14px;
  line-height:1.8;
  color:var(--line);
}
.footer-columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col{min-width:0;}
.footer-col__title{
  font-family:var(--font-num);
  font-size:12px;
  font-weight:400;
  letter-spacing:.24em;
  color:var(--lamp);
  margin:0 0 14px;
}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin:0 0 8px;}
.footer-link{
  color:var(--line);
  text-decoration:none;
  font-size:14px;
  letter-spacing:.04em;
  transition:color .22s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible{color:var(--cyan);}
.footer-contact{display:flex;flex-direction:column;gap:10px;}
.footer-contact__row{
  display:grid;
  grid-template-columns:46px minmax(0,1fr);
  gap:10px;
  font-size:13.5px;
  line-height:1.7;
}
.footer-contact__label{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--lamp);
}
.footer-contact__value{color:var(--paper);word-break:break-word;}
.footer-note{
  margin:14px 0 0;
  font-size:12.5px;
  color:var(--gray);
  letter-spacing:.04em;
}
.footer-lamp-row{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:12px;
  margin:clamp(34px,5vw,58px) 0 0;
  padding:0 6%;
}
.footer-lamp{
  position:relative;
  width:6px;
  height:34px;
  border-radius:3px;
  background:linear-gradient(180deg,rgba(245,184,75,.85),rgba(245,184,75,.08));
}
.footer-lamp::before{
  content:"";
  position:absolute;
  left:50%;top:-9px;
  width:14px;height:14px;
  margin-left:-7px;
  border-radius:50%;
  background:radial-gradient(circle,var(--glow),var(--lamp) 60%,rgba(245,184,75,0));
  box-shadow:0 0 18px rgba(245,184,75,.75);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  margin-top:clamp(24px,4vw,40px);
  padding:20px 0 28px;
  border-top:1px solid rgba(168,176,189,.2);
  font-size:13px;
  color:var(--line);
}
.footer-bottom__copy,
.footer-bottom__icp,
.footer-legal{margin:0;}
.footer-bottom__icp{color:var(--gray);}
.footer-legal{display:inline-flex;align-items:center;gap:8px;margin-left:auto;}
.footer-legal__link{color:var(--line);text-decoration:none;}
.footer-legal__link:hover{color:var(--cyan);}
.footer-legal__sep{color:rgba(168,176,189,.45);}

/* responsive */
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr;}
  .footer-columns{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:860px){
  body{font-size:16px;}
  .header-masthead{flex-wrap:wrap;gap:12px;}
  .header-meta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-bar{padding-top:0;}
  .nav{display:none;}
  .site-header[data-open="true"] .nav{display:block;}
  .nav-list{
    flex-direction:column;
    gap:2px;
    padding:8px 0 14px;
    overflow:visible;
  }
  .nav-item{width:100%;}
  .nav-link{
    flex-direction:row;
    align-items:baseline;
    gap:14px;
    padding:13px 12px;
    border-radius:12px;
    background:rgba(23,35,63,.5);
    border:1px solid rgba(168,176,189,.14);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{border-color:transparent;}
  .header-contact{
    top:auto;
    bottom:18px;
    transform:none;
  }
  .header-contact__link{
    flex-direction:row;
    writing-mode:horizontal-tb;
    padding:9px 14px;
    border:1px solid rgba(245,184,75,.4);
    border-radius:999px;
    letter-spacing:.14em;
  }
  .header-contact__text{writing-mode:horizontal-tb;}
  .grid--2,.grid--3{grid-template-columns:1fr;}
  .footer-columns{grid-template-columns:1fr;}
  .footer-lamp-row{padding:0;}
  .footer-legal{margin-left:0;}
}
@media (max-width:420px){
  .brand-name{font-size:17px;}
  .brand-note{letter-spacing:.12em;}
}
html.nav-open,
html.nav-open body{overflow:hidden;}
@media (min-width:861px){
  html.nav-open,
  html.nav-open body{overflow:auto;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .read-progress__bar{transition:none;}
}