*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
[hidden]{display:none !important}

:root{
  --ink:#0B241E;
  --felt:#123B31;
  --table:#1B4D3F;
  --cream:#F3E9D2;
  --paper:#FBF5E6;
  --gold:#D9B56B;
  --gold-soft:#EFD9A7;
  --orange:#F0562E;
  --orange-deep:#B93A18;
  --brown:#241A13;
  --sage:#7E9A8F;
  --line:#3E6B5C;
  --focus:#7FD6B4;
  --shadow-hard:8px 8px 0 0 #061612;
  --shadow-soft:6px 6px 0 0 rgba(6,22,18,.88);
  --maxw:1280px;
  --gutter:64px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (max-width:1200px){:root{--gutter:32px}}
@media (max-width:720px){:root{--gutter:20px}}

body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:clamp(16px,.35vw + 15px,17px);
  line-height:1.75;
  color:var(--cream);
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(45deg,rgba(243,233,210,.022) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(-45deg,rgba(0,0,0,.16) 0 1px,transparent 1px 3px),
    radial-gradient(120% 80% at 16% -12%,rgba(217,181,107,.13),transparent 62%),
    radial-gradient(90% 70% at 100% 0%,rgba(27,77,63,.55),transparent 66%);
  background-attachment:fixed;
}
@media (max-width:900px){body{background-attachment:scroll}}

h1,h2,h3,h4{font-weight:900;line-height:1.18;letter-spacing:-.02em;color:var(--cream)}
h1{font-size:clamp(32px,4.2vw,64px)}
h2{font-size:clamp(24px,2.6vw,48px)}
h3{font-size:clamp(18px,1.6vw,24px)}
strong{font-weight:800}

:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.visually-hidden{position:absolute !important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.page-shell{width:100%;max-width:var(--maxw);margin-inline:auto;padding:clamp(28px,4vw,56px) var(--gutter) clamp(40px,6vw,80px)}
.panel-stack{display:flex;flex-direction:column;gap:clamp(20px,3vw,34px)}
.panel-stack > .section-panel:nth-child(even){margin-inline-start:clamp(0px,2.5vw,26px)}
@media (max-width:900px){.panel-stack > .section-panel:nth-child(even){margin-inline-start:0}}
.panel-grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.panel-grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
@media (max-width:900px){.panel-grid--5-7{grid-template-columns:minmax(0,1fr)}}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:12px;top:-120px;z-index:200;
  padding:10px 18px;font-size:14px;font-weight:800;letter-spacing:.04em;
  color:var(--ink);background:var(--gold);border:2px solid var(--brown);
  transition:top .16s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:10px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background-color:rgba(11,36,30,.97);
  background-image:repeating-linear-gradient(90deg,rgba(243,233,210,.03) 0 1px,transparent 1px 5px);
  border-bottom:2px solid var(--line);
  box-shadow:0 4px 0 0 rgba(6,22,18,.6);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:linear-gradient(90deg,var(--gold) 0 20%,transparent 20% 100%);
  pointer-events:none;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(14px,2vw,32px);
  max-width:var(--maxw);margin-inline:auto;
  padding:clamp(10px,1.3vw,16px) var(--gutter);
}
.header-brand{display:flex;align-items:center;min-width:0}
.brand-link{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand-badge{
  display:grid;place-items:center;flex:none;
  width:44px;height:44px;
  font-size:20px;font-weight:900;line-height:1;
  color:var(--ink);background:var(--gold);
  border:2px solid var(--gold-soft);
  box-shadow:4px 4px 0 0 rgba(6,22,18,.9);
  transform:skewX(-6deg);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.brand-link:hover .brand-badge{background:var(--orange);color:var(--brown);border-color:var(--orange-deep)}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-mark{font-size:clamp(18px,1.4vw,21px);font-weight:900;letter-spacing:-.01em;line-height:1.2;color:var(--cream)}
.brand-domain{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;line-height:1.3;color:var(--sage)}

.nav-toggle{
  display:none;align-items:center;justify-content:center;flex:none;
  width:46px;height:44px;
  border:2px solid var(--line);background:var(--table);color:var(--cream);
  cursor:pointer;
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:var(--felt)}
.nav-toggle-icon{position:relative;display:block;width:20px;height:14px}
.nav-toggle-bar{position:absolute;left:0;width:20px;height:2px;background:currentColor;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle-bar:nth-child(1){top:0}
.nav-toggle-bar:nth-child(2){top:6px}
.nav-toggle-bar:nth-child(3){top:12px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.header-nav{display:flex;align-items:center;gap:clamp(12px,1.6vw,24px);min-width:0}
.nav-scroller{min-width:0;overflow-x:auto;scrollbar-width:none}
.nav-scroller::-webkit-scrollbar{display:none}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{flex:none}
.nav-link{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 11px;font-size:15px;font-weight:600;
  color:#CFDBD2;border:2px solid transparent;
  transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease);
}
.nav-link:hover{color:var(--gold-soft);background:var(--table);border-color:var(--line)}
.nav-link[aria-current="page"]{color:var(--gold-soft);background:rgba(217,181,107,.12);border-color:var(--gold);box-shadow:inset 0 -2px 0 0 var(--gold)}
.nav-num{font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.1em;color:var(--gold);opacity:.75}
.nav-link[aria-current="page"] .nav-num{opacity:1}

.nav-utility{
  display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex:none;
  padding-left:clamp(8px,1.4vw,18px);
  border-left:2px solid var(--line);
}
.nav-member{
  display:inline-flex;align-items:center;
  padding:5px 12px;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--gold-soft);background:rgba(217,181,107,.08);border:2px solid var(--gold);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.nav-member:hover{background:var(--gold);border-color:var(--gold-soft);color:var(--ink)}
.channel-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 8px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.1em;
  color:var(--brown);background:var(--orange);border:1px solid var(--orange-deep);
  transition:background-color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.channel-tag:hover{background:var(--gold);border-color:var(--gold-soft);transform:translateY(-1px)}
.channel-device{position:relative;display:block;flex:none;width:8px;height:13px;border:1.5px solid currentColor;border-radius:2px}
.channel-device::after{content:"";position:absolute;left:50%;bottom:1px;width:3px;height:1.5px;background:currentColor;transform:translateX(-50%)}

@media (max-width:980px){
  .header-inner{flex-wrap:wrap;gap:10px;padding-top:12px;padding-bottom:12px}
  .header-brand{order:1}
  .nav-toggle{display:inline-flex;order:2;margin-left:auto}
  .header-nav{
    order:3;flex-basis:100%;width:100%;
    flex-direction:column;align-items:stretch;gap:12px;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;
    transition:max-height .3s var(--ease),opacity .2s linear,visibility 0s linear .3s;
  }
  .site-header[data-open] .header-nav{
    max-height:min(76vh,620px);opacity:1;visibility:visible;overflow-y:auto;
    transition:max-height .3s var(--ease),opacity .2s linear,visibility 0s linear 0s;
  }
  .nav-scroller{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:2px}
  .nav-list{gap:6px}
  .nav-link{padding:8px 12px;border-color:var(--line);background:rgba(27,77,63,.6);white-space:nowrap}
  .nav-link[aria-current="page"]{background:rgba(240,86,46,.16);border-color:var(--orange)}
  .nav-utility{
    flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:flex-start;gap:10px;
    padding-left:0;padding-top:12px;border-left:0;border-top:2px dashed var(--line);
  }
}
@media (max-width:520px){
  .brand-badge{width:38px;height:38px;font-size:18px}
  .brand-domain{font-size:10px;letter-spacing:.06em}
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,110px);
  padding:clamp(32px,5vw,64px) 0 clamp(20px,3vw,32px);
  color:var(--cream);
  background-color:#081B16;
  background-image:
    repeating-linear-gradient(45deg,rgba(243,233,210,.02) 0 1px,transparent 1px 4px),
    radial-gradient(80% 60% at 50% 0%,rgba(217,181,107,.10),transparent 70%);
  border-top:2px solid var(--gold);
}
.footer-inner{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.footer-panel{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(20px,2.6vw,32px);
  padding:clamp(22px,3vw,40px);
  background-color:var(--felt);
  background-image:
    repeating-linear-gradient(45deg,rgba(243,233,210,.03) 0 1px,transparent 1px 4px),
    repeating-linear-gradient(-45deg,rgba(0,0,0,.14) 0 1px,transparent 1px 4px);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.footer-masthead{grid-column:span 5;display:flex;flex-direction:column;gap:8px;min-width:0}
.footer-mark{
  display:inline-block;
  font-size:clamp(22px,2.2vw,28px);font-weight:900;letter-spacing:-.01em;line-height:1.2;color:var(--cream);
  border-bottom:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-mark:hover{color:var(--gold-soft);border-bottom-color:var(--orange)}
.footer-domain{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--gold)}
.footer-summary{max-width:34ch;font-size:14px;line-height:1.7;color:#C3D3C9}
.footer-columns{grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,2vw,28px)}
.footer-col{min-width:0}
.footer-heading{
  margin-bottom:12px;padding-bottom:8px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--gold);border-bottom:1px solid var(--line);
}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-link{
  display:inline-block;padding:2px 0;font-size:15px;color:#D5E0D8;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover{color:var(--gold-soft);border-bottom-color:var(--orange)}
.footer-contact{
  grid-column:1 / -1;
  display:grid;gap:16px;
  padding:clamp(18px,2.4vw,28px);
  color:var(--brown);background:var(--paper);
  background-image:radial-gradient(rgba(36,26,19,.07) 1px,transparent 1px);
  background-size:5px 5px;
  border:2px solid var(--brown);
  box-shadow:6px 6px 0 0 rgba(6,22,18,.9);
}
.footer-contact .footer-heading{color:var(--brown);border-bottom:2px solid var(--orange)}
.footer-contact-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.footer-contact-item{display:flex;flex-direction:column;gap:4px;min-width:0}
.footer-contact-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--orange-deep)}
.footer-contact-value{font-size:15px;font-weight:700;line-height:1.5;color:var(--brown);word-break:break-word}
.footer-note{max-width:66ch;font-size:13px;line-height:1.7;color:#5A4B3E}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
  margin-top:clamp(20px,3vw,32px);padding-top:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--sage);
  border-top:1px solid var(--line);
}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:6px 16px}
.footer-legal-link{color:var(--gold-soft);border-bottom:1px solid transparent;transition:color .16s var(--ease),border-color .16s var(--ease)}
.footer-legal-link:hover{color:var(--orange);border-bottom-color:currentColor}
.footer-icp,.footer-copy{color:var(--sage)}
.footer-mobile-note{flex-basis:100%;font-size:11px;line-height:1.7;color:var(--sage);opacity:.85}
@media (max-width:900px){
  .footer-panel{grid-template-columns:minmax(0,1fr)}
  .footer-masthead,.footer-columns,.footer-contact{grid-column:1 / -1}
}
@media (max-width:620px){
  .footer-columns{grid-template-columns:1fr}
  .footer-contact-list{grid-template-columns:1fr}
  .footer-summary{max-width:none}
}

/* ---------- panels ---------- */
.section-panel{
  position:relative;
  padding:clamp(20px,3.2vw,44px);
  background-color:var(--felt);
  background-image:
    repeating-linear-gradient(45deg,rgba(243,233,210,.028) 0 1px,transparent 1px 4px),
    repeating-linear-gradient(-45deg,rgba(0,0,0,.13) 0 1px,transparent 1px 4px);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.panel--paper{
  color:var(--brown);
  background-color:var(--cream);
  background-image:radial-gradient(rgba(36,26,19,.07) 1px,transparent 1px);
  background-size:5px 5px;
  border-color:var(--brown);
}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:var(--brown)}
.panel--paper a{color:var(--orange-deep);border-bottom:1px solid var(--orange)}
.section-head{display:flex;flex-direction:column;gap:10px;margin-bottom:clamp(16px,2.4vw,28px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.16em;
  color:var(--gold);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange)}
.section-num{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.16em;color:var(--gold)}
.section-title{font-size:clamp(24px,2.4vw,40px);font-weight:900;letter-spacing:-.02em}
.section-title--slant{transform:skewX(-6deg);transform-origin:left bottom}
.section-lede{max-width:70ch;font-size:16px;line-height:1.8;color:#C9D8CE}
.panel--paper .section-lede{color:#4C3D31}

/* ---------- tags & index band ---------- */
.index-band{margin-block:clamp(12px,2vw,20px)}
.index-band__scroll{
  display:flex;gap:10px;align-items:center;
  overflow-x:auto;padding:4px 2px 10px;
  scrollbar-width:thin;scrollbar-color:var(--line) transparent;
}
.index-band__scroll::-webkit-scrollbar{height:6px}
.index-band__scroll::-webkit-scrollbar-thumb{background:var(--line)}
.tag{
  display:inline-flex;align-items:center;gap:6px;flex:none;
  height:36px;padding:0 12px;
  font-size:13px;font-weight:600;letter-spacing:.08em;white-space:nowrap;
  color:var(--cream);background:rgba(27,77,63,.55);
  border:1px solid var(--line);
  transition:border-color .12s var(--ease),color .12s var(--ease),box-shadow .12s var(--ease),background-color .12s var(--ease);
}
.tag:hover{border-color:var(--gold);color:var(--gold-soft);box-shadow:0 0 0 1px rgba(217,181,107,.35)}
.tag--gold{color:var(--gold-soft);border-color:var(--gold)}
.tag--orange{color:var(--brown);background:var(--orange);border-color:var(--orange-deep)}
.tag--active{color:var(--brown);background:var(--orange);border-color:var(--orange-deep)}

/* ---------- filter ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:8px;
  padding:10px;
  background:rgba(11,36,30,.55);
  border:2px dashed var(--line);
}
.filter-btn{
  display:inline-flex;align-items:center;gap:6px;
  min-height:36px;padding:0 14px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--cream);background:transparent;
  border:1px solid var(--line);cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.filter-btn:hover{border-color:var(--gold);color:var(--gold-soft);transform:translateY(-1px)}
.filter-btn[aria-pressed="true"]{color:var(--brown);background:var(--orange);border-color:var(--orange-deep);transform:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  font-size:15px;font-weight:800;letter-spacing:.04em;
  color:var(--gold-soft);background:transparent;
  border:2px solid var(--gold);
  box-shadow:4px 4px 0 0 rgba(6,22,18,.9);
  cursor:pointer;
  transition:transform .12s var(--ease),box-shadow .12s var(--ease),background-color .12s var(--ease),color .12s var(--ease);
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:6px 6px 0 0 rgba(6,22,18,.9)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 0 rgba(6,22,18,.9)}
.btn--gold{color:var(--ink);background:var(--gold);border-color:var(--gold-soft)}
.btn--gold:hover{background:var(--gold-soft)}
.btn--orange{color:var(--brown);background:var(--orange);border-color:var(--orange-deep)}
.btn--orange:hover{background:#FF7A4E}
.btn--outline{color:var(--cream);border-color:var(--line)}
.btn--outline:hover{border-color:var(--gold);color:var(--gold-soft)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:4px;margin-bottom:clamp(14px,2vw,22px);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--sage)}
.crumb{display:inline-flex;align-items:center;gap:8px;color:var(--sage)}
.crumb + .crumb::before{content:"/";color:var(--line)}
.crumb a:hover{color:var(--gold-soft)}
.crumb[aria-current="page"]{color:var(--cream)}

/* ---------- prose ---------- */
.prose{max-width:74ch;font-size:17px;line-height:1.8;color:#E2E9E0}
.prose > * + *{margin-top:1em}
.prose h2,.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li + li{margin-top:.4em}
.prose a{color:var(--gold-soft);border-bottom:1px solid var(--line)}
.prose strong{color:var(--gold-soft)}
.panel--paper .prose{color:var(--brown)}
.panel--paper .prose strong{color:var(--orange-deep)}

/* ---------- media ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  background-color:var(--table);
  background-image:linear-gradient(135deg,rgba(217,181,107,.14) 0 2px,transparent 2px 12px);
  border:2px solid var(--line);
  box-shadow:var(--shadow-soft);
}
.media-frame img,.media-frame video{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame:empty::after{
  content:"图像位";
  position:absolute;inset:auto 12px 10px 12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--sage);
}
.media-caption{margin-top:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--sage)}

/* ---------- scroll progress (injected by JS) ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  width:0;height:3px;
  background:linear-gradient(90deg,var(--gold),var(--orange));
  pointer-events:none;
}

/* ---------- reveal ---------- */
.site-js [data-reveal]{
  opacity:0;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.site-js [data-reveal].is-revealed{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .site-js [data-reveal]{opacity:1;transform:none;transition:none}
  .scroll-progress{transition:none}
  .btn:hover,.filter-btn:hover,.channel-tag:hover{transform:none}
}