:root{
  --bg:#061A15;
  --panel:#0D2B24;
  --raise:#143D33;
  --text:#E8F3EE;
  --cyan:#93E9D8;
  --gold:#F3C969;
  --wine:#7B263B;
  --muted:#A8BBB4;
  --line:#2E6B5A;
  --edge:#D7B36A;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell:1180px;
  --pad:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  min-height:100%;
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 14% -6%,rgba(147,233,216,.09),transparent 52%),
    radial-gradient(circle at 92% 2%,rgba(243,201,105,.07),transparent 46%),
    repeating-linear-gradient(0deg,rgba(46,107,90,.13) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(90deg,rgba(46,107,90,.13) 0 1px,transparent 1px 64px);
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{font-weight:800;line-height:1.2;letter-spacing:-.02em;margin:0}
p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
button,input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

:where(h1,h2,h3,h4,section,article,div[id],li[id],figure[id]){scroll-margin-top:132px}
#main-content{scroll-margin-top:132px}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  box-shadow:0 0 0 4px rgba(147,233,216,.16),0 0 18px rgba(147,233,216,.22);
  border-radius:2px;
}

.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 布局基础 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:clamp(32px,5vw,72px)}
.section-title{font-size:clamp(22px,3vw,34px);letter-spacing:-.02em}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--line),rgba(46,107,90,0))}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);flex:0 0 auto}

.prose{max-width:68ch;font-size:16px;line-height:1.8;color:var(--text)}
.prose p{margin:0 0 1em}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{font-size:clamp(19px,2.2vw,24px);margin:1.6em 0 .6em}
.prose ul,.prose ol{list-style:disc;padding-left:1.2em;margin:0 0 1em}
.prose li{margin:.25em 0}

/* ---------- 页头 ---------- */
.skip-link{
  position:absolute;left:50%;top:-120px;transform:translateX(-50%);
  z-index:200;padding:10px 18px;
  background:var(--gold);color:#1B1405;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:10px}

.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(6,26,21,.96);
  -webkit-backdrop-filter:blur(7px) saturate(140%);
  backdrop-filter:blur(7px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,21,17,.99);
  box-shadow:0 22px 42px -26px rgba(0,0,0,.95),0 1px 0 rgba(147,233,216,.16);
}

.header-scale{
  height:13px;
  border-bottom:1px solid rgba(46,107,90,.4);
  background-image:repeating-linear-gradient(90deg,rgba(46,107,90,.9) 0 1px,transparent 1px 30px);
  background-size:100% 7px;
  background-position:0 0;
  background-repeat:no-repeat;
}

.header-masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  padding:14px 0;
}

.header-tag{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);white-space:nowrap;
}
.header-tag i{font-style:normal;color:var(--cyan);letter-spacing:.1em}
.header-tag span{opacity:.55}

.brand{
  justify-self:center;
  display:inline-flex;align-items:center;gap:12px;
  text-decoration:none;color:var(--text);
}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:38px;height:38px;
  display:grid;place-items:center;
  background:var(--raise);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.brand-mark::before{
  content:"";width:18px;height:18px;border-radius:50%;
  border:1px solid rgba(147,233,216,.55);
}
.brand-mark::after{
  content:"";position:absolute;width:6px;height:6px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 2px rgba(243,201,105,.18);
}
.brand:hover .brand-mark{border-color:var(--cyan);background:#17453A}

.brand-text{display:block}
.brand-name{
  display:block;
  font-size:clamp(19px,2.3vw,25px);
  font-weight:800;letter-spacing:-.02em;line-height:1.15;
}
.brand-edition{
  display:block;margin-top:3px;
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);
}

.header-end{justify-self:end;display:flex;align-items:center;gap:14px}

.header-action{
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  color:var(--gold);text-decoration:none;
  padding:7px 13px;
  border:1px solid rgba(215,179,106,.5);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.header-action:hover{background:var(--gold);color:#12241C;border-color:var(--gold)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:8px 12px;
  background:transparent;border:1px solid var(--line);
  color:var(--text);cursor:pointer;
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  transition:border-color .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(147,233,216,.08)}
.nav-toggle-label{white-space:nowrap}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:var(--cyan);flex:0 0 auto}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);
  transition:transform .2s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.header-navrow{
  position:relative;
  border-top:1px solid rgba(46,107,90,.45);
  background:rgba(13,43,36,.5);
}
.header-navshell{display:flex;align-items:center;justify-content:center;gap:16px}

.primary-nav{display:block}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center;gap:0}
.nav-list a{
  position:relative;display:block;
  padding:12px 18px;
  font-size:14px;font-weight:500;
  color:var(--muted);text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-list a::after{
  content:"";position:absolute;left:18px;right:18px;bottom:6px;height:1px;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-list a:hover{color:var(--text);background:rgba(20,61,51,.55)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--gold)}
.nav-list a[aria-current="page"]::after{display:none}

.header-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(46,107,90,.35);
}
.header-progress span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(ellipse at 12% 0%,rgba(20,61,51,.85),transparent 62%),
    linear-gradient(180deg,#08211B 0%,#061A15 72%);
  color:var(--text);
}
.footer-scale{
  height:12px;
  border-bottom:1px solid rgba(46,107,90,.35);
  background-image:repeating-linear-gradient(90deg,rgba(46,107,90,.85) 0 1px,transparent 1px 30px);
  background-size:100% 7px;
  background-position:0 0;
  background-repeat:no-repeat;
}

.footer-shell{
  display:grid;
  grid-template-columns:1.35fr .75fr .75fr 1.15fr;
  gap:clamp(24px,3.4vw,48px);
  padding-top:clamp(30px,4vw,54px);
  padding-bottom:clamp(26px,3.4vw,42px);
}

.footer-brandline{
  max-width:27ch;
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.7;color:var(--text);
}
.footer-coord{
  display:inline-flex;align-items:center;gap:9px;
  margin-top:14px;
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);
}
.footer-coord::before{content:"";width:22px;height:1px;background:var(--gold)}

.footer-heading{
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--muted);
}
.footer-heading::before{
  content:"";width:6px;height:6px;background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 100%);
  flex:0 0 auto;
}

.footer-list{display:grid;gap:2px}
.footer-list a{
  display:inline-block;padding:5px 0;
  font-size:14px;color:var(--muted);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:rgba(147,233,216,.5)}

.footer-contact .footer-list li{
  padding:5px 0;font-size:14px;line-height:1.65;color:var(--text);
  word-break:break-word;
}
.footer-label{
  display:block;margin-bottom:1px;
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}
.footer-note{
  margin-top:14px;padding-left:11px;
  border-left:2px solid var(--wine);
  font-size:12px;line-height:1.7;color:var(--muted);
}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  padding:16px 0 30px;
  border-top:1px solid rgba(46,107,90,.5);
  font-family:var(--mono);font-size:11px;letter-spacing:.05em;color:var(--muted);
}
.footer-copy{margin:0}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:6px 20px}
.footer-legal-links a{
  color:var(--muted);text-decoration:none;
  border-bottom:1px solid rgba(168,187,180,.32);
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-legal-links a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- 面包屑 ---------- */
.crumbs{margin:clamp(18px,2.4vw,30px) 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;gap:0 8px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--muted)}
.crumbs li{display:inline-flex;align-items:center}
.crumbs li+li::before{content:"/";margin-right:8px;color:var(--line)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--cyan)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 22px;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  text-decoration:none;cursor:pointer;
  color:var(--text);background:var(--raise);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{background:var(--cyan);color:#07261F;border-color:var(--cyan);transform:translateY(-2px)}
.btn--gold{background:var(--gold);color:#1B1405;border-color:var(--gold)}
.btn--gold:hover{background:#FFD98A;color:#1B1405;border-color:#FFD98A}
.btn--ghost{background:transparent}
.btn--ghost:hover{background:rgba(147,233,216,.12);color:var(--cyan);border-color:var(--cyan)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);border:1px solid var(--line);
}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor;flex:0 0 auto}
.tag--live{color:var(--cyan);border-color:rgba(147,233,216,.5);background:rgba(147,233,216,.1)}
.tag--gold{color:var(--gold);border-color:rgba(243,201,105,.5);background:rgba(243,201,105,.1)}
.tag--warn{color:#F2C0CD;border-color:var(--wine);background:rgba(123,38,59,.4)}

/* ---------- 面板 ---------- */
.panel{
  padding:clamp(18px,2.6vw,28px);
  background:var(--panel);
  border:1px solid var(--line);
}
.panel--raise{background:var(--raise)}
.panel-cut{
  --cut:18px;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.panel-cut.panel:hover,.panel-cut.panel--raise:hover{border-color:var(--cyan)}

/* ---------- 图片容器（页面阶段使用） ---------- */
.frame{
  position:relative;display:block;overflow:hidden;
  background:var(--raise);
  border:1px solid var(--line);
}
.frame img{
  display:block;width:100%;height:100%;object-fit:cover;
  filter:saturate(.9) contrast(1.06) brightness(.92);
}
.frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(165deg,rgba(6,26,21,.1) 0%,rgba(6,26,21,.5) 58%,rgba(6,26,21,.82) 100%);
}
.frame--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%)}
.frame--wide{aspect-ratio:16/9}
.frame--tall{aspect-ratio:3/4}
.frame--square{aspect-ratio:1/1}
.frame-caption{
  margin-top:8px;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
}

/* ---------- 进入视口显现 ---------- */
@media (prefers-reduced-motion:no-preference){
  html.js [data-reveal]{
    opacity:0;transform:translateY(12px);
    transition:opacity .45s var(--ease),transform .45s var(--ease);
  }
  html.js [data-reveal].is-revealed{opacity:1;transform:none}
}

/* ---------- 平板 ---------- */
@media (max-width:1024px){
  .footer-shell{grid-template-columns:1.2fr .8fr .8fr 1.2fr;gap:28px}
}

/* ---------- 移动 / 平板导航 ---------- */
@media (max-width:900px){
  :where(h1,h2,h3,h4,section,article,div[id],li[id],figure[id]){scroll-margin-top:100px}
  #main-content{scroll-margin-top:100px}

  .header-masthead{grid-template-columns:1fr auto;padding:12px 0}
  .header-tag{display:none}
  .brand{justify-self:start}
  .header-action{display:none}
  .nav-toggle{display:inline-flex}

  .header-navrow{border-top:0;background:transparent}
  .header-navshell{justify-content:flex-start;min-height:0}

  .primary-nav{
    position:absolute;top:0;left:0;right:0;
    padding:6px 0 14px;
    background:linear-gradient(180deg,#0B2620 0%,#08211B 100%);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 52px -22px rgba(0,0,0,.9);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    max-height:calc(100vh - 84px);
    max-height:calc(100dvh - 84px);
    overflow-y:auto;
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .primary-nav[data-open="true"]{opacity:1;visibility:visible;transform:translateY(0)}

  .nav-list{flex-direction:column;flex-wrap:nowrap;align-items:stretch}
  .nav-list a{
    padding:14px clamp(16px,5vw,28px);
    font-size:15px;
    border-bottom:1px solid rgba(46,107,90,.35);
    border-left:2px solid transparent;
  }
  .nav-list a::after{display:none}
  .nav-list a:hover{background:rgba(20,61,51,.65)}
  .nav-list a[aria-current="page"]{
    border-bottom-color:rgba(46,107,90,.35);
    border-left-color:var(--gold);
    background:rgba(20,61,51,.7);
  }

  .footer-shell{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
}

@media (max-width:760px){
  .grid--2,.grid--3{grid-template-columns:1fr}
}

@media (max-width:560px){
  .footer-shell{grid-template-columns:1fr;gap:26px}
  .footer-brand{grid-column:auto}
  .footer-legal{justify-content:flex-start;padding-bottom:34px}
  .brand-mark{width:34px;height:34px}
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .btn:hover,
  .header-action:hover,
  .footer-list a:hover{transform:none !important}
  .primary-nav{transition:none !important}
}