/* ============================================================
   问鼎娱乐主站 · 共享样式 /assets/site.css
   墨夜深黑底 + 鎏金主调 + 霓虹青数据层
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:#0A0A0C}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0A0A0C;
  --ink-2:#14141A;
  --panel:#1E1E26;
  --gold:#C9A227;
  --gold-lt:#E8C766;
  --violet:#7B4DFF;
  --cyan:#35E0D6;
  --cream:#F2E8D5;
  --grey:#8A8A96;
  --red:#C0392B;

  --line:rgba(201,162,39,.22);
  --line-soft:rgba(201,162,39,.10);
  --line-strong:rgba(232,199,102,.58);

  --maxw:1320px;
  --gutter:clamp(18px,4vw,44px);
  --cut:18px;
  --cut-sm:12px;
  --rail-top:132px;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --fs-display:clamp(38px,5.4vw,56px);
  --fs-h1:clamp(30px,4.2vw,40px);
  --fs-h2:clamp(23px,3vw,28px);
  --fs-h3:clamp(19px,2.2vw,20px);
  --fs-body:clamp(15.5px,1.1vw,17px);
  --fs-note:12px;

  --space-section:clamp(72px,9vw,144px);
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:320ms;
}

/* ---------- 3. Base ---------- */
body{
  position:relative;
  min-height:100vh;
  background:transparent;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    radial-gradient(120% 82% at 100% 0%,rgba(123,77,255,.11),transparent 62%),
    radial-gradient(92% 62% at 0% 100%,rgba(53,224,214,.07),transparent 64%),
    linear-gradient(to right,rgba(201,162,39,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(201,162,39,.045) 1px,transparent 1px);
  background-size:100% 100%,100% 100%,96px 96px,96px 96px;
}
::selection{background:var(--gold);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:2px}
#main-content{scroll-margin-top:clamp(120px,18vh,180px);display:block}

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-80px;
  z-index:200;
  padding:10px 18px;
  background:linear-gradient(135deg,var(--gold-lt),var(--gold));
  color:var(--ink);
  font-weight:900;
  font-size:14px;
  letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:top 200ms var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 5. Header : 居中刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg,rgba(10,10,12,.98),rgba(20,20,26,.94));
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.masthead{position:relative}
.masthead::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line-strong) 18%,rgba(53,224,214,.35) 50%,var(--line-strong) 82%,transparent);
}
.masthead__inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:14px var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:12px 20px;
}

/* 品牌字标 */
.brand{display:flex;align-items:center;gap:12px;min-width:0;justify-self:start}
.brand__mark{
  flex:none;
  width:40px;height:40px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--gold-lt),var(--gold));
  color:var(--ink);
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%);
}
.brand__text{min-width:0;display:block}
.brand__name{
  display:block;
  font-weight:900;
  font-size:19px;
  letter-spacing:.08em;
  line-height:1.2;
  color:var(--cream);
}
.brand__sub{
  display:block;
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--grey);
  white-space:nowrap;
}
.brand--footer{margin-bottom:0}

/* 刊头中段等宽信息 */
.masthead__meta{
  justify-self:center;
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--grey);
  white-space:nowrap;
}
.masthead__divider{width:1px;height:12px;background:var(--line)}
.masthead__stat{color:var(--cyan)}

/* 右上角工具入口 */
.utility{justify-self:end;display:flex;align-items:center;gap:12px}
.utility__link{
  padding:6px 2px;
  font-size:14px;
  letter-spacing:.1em;
  color:var(--grey);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.utility__link:hover{color:var(--cream);border-bottom-color:var(--line-strong)}
.utility__link--accent{
  padding:9px 16px;
  color:var(--gold-lt);
  border:1px solid var(--line);
  border-bottom-color:var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}
.utility__link--accent:hover{color:var(--ink);background:var(--gold-lt);border-color:var(--gold-lt)}

/* 移动端栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line);
  color:var(--cream);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--gold-lt)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bar{
  display:block;height:1.5px;background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5.5px) 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(-5.5px) rotate(-45deg)}
.nav-toggle__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em}

/* 栏目行 */
.site-nav{
  position:relative;
  border-top:1px solid var(--line-soft);
  background:rgba(20,20,26,.55);
}
.site-nav__list{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:clamp(6px,2.2vw,38px);
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:block;
  padding:14px 2px 15px;
  font-size:15px;
  letter-spacing:.12em;
  color:var(--cream);
  opacity:.74;
  transition:opacity var(--dur) var(--ease),color var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--gold-lt);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform var(--dur) var(--ease);
}
.site-nav__link:hover{opacity:1}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{opacity:1;color:var(--gold-lt)}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:linear-gradient(90deg,var(--gold),var(--cyan));
}

/* 状态窄条 */
.status-strip{
  border-top:1px solid var(--line-soft);
  background:var(--ink-2);
}
.status-strip__inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:8px var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(16px,3vw,34px);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--grey);
  white-space:nowrap;
  overflow-x:auto;
  scrollbar-width:none;
}
.status-strip__inner::-webkit-scrollbar{display:none}
.status-strip__item{display:inline-flex;align-items:center;gap:8px}
.status-strip__key{color:var(--cyan)}
.status-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px rgba(53,224,214,.9);
}

/* 阅读进度 */
.progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(201,162,39,.14);
  pointer-events:none;
}
.progress__bar{
  position:relative;
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--gold),var(--gold-lt));
}
.progress__bar::after{
  content:"";
  position:absolute;
  right:-2px;top:50%;
  width:6px;height:6px;
  margin-top:-3px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,224,214,.95);
}

/* ---------- 6. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:var(--space-section);
  background:linear-gradient(180deg,var(--ink-2),var(--ink));
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:26px;
  background:repeating-linear-gradient(115deg,transparent 0 20px,rgba(201,162,39,.10) 20px 21px);
  pointer-events:none;
}
.footer-grid{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(56px,7vw,96px) var(--gutter) 0;
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr));
  gap:clamp(26px,4vw,56px);
}
.footer-brand{min-width:0}
.footer-brand__desc{
  margin-top:20px;
  max-width:42ch;
  font-size:15px;
  line-height:1.85;
  color:var(--grey);
}
.footer-brand__meta{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:rgba(201,162,39,.75);
}
.footer-col{min-width:0}
.footer-col__title{
  margin-bottom:16px;
  padding-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--gold);
  border-bottom:1px solid var(--line-soft);
}
.footer-col__list{display:grid;gap:11px}
.footer-link{
  font-size:15px;
  color:var(--cream);
  opacity:.76;
  transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.footer-link:hover{opacity:1;color:var(--gold-lt);padding-left:6px}

.footer-contact{
  max-width:var(--maxw);
  margin:clamp(44px,5vw,76px) auto 0;
  padding:0 var(--gutter);
}
.footer-contact__panel{
  background:var(--panel);
  border:1px solid var(--line-soft);
  padding:clamp(20px,2.6vw,30px) clamp(18px,3vw,34px);
  display:grid;
  gap:12px;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.footer-contact__line{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 14px;
  font-size:15px;
  color:var(--cream);
  letter-spacing:.02em;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--grey);
  min-width:72px;
}
.footer-legal{
  max-width:var(--maxw);
  margin:clamp(28px,4vw,46px) auto 0;
  padding:22px var(--gutter) 46px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 26px;
  font-size:13px;
  color:var(--grey);
  letter-spacing:.04em;
}
.footer-legal__line{font-family:var(--font-mono);letter-spacing:.1em}
.footer-legal__note{max-width:64ch;line-height:1.8}
.footer-top{
  padding:9px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--gold-lt);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.footer-top:hover{background:var(--gold-lt);color:var(--ink)}

/* ---------- 7. 容器 / 分屏骨架 ---------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}
.shell--narrow{max-width:820px}
.split{
  display:grid;
  grid-template-columns:320px minmax(0,1fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.split--index{grid-template-columns:280px minmax(0,1fr)}
.split--reflow{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr)}
.grid-auto{
  display:grid;
  gap:clamp(16px,2vw,28px);
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}

/* ---------- 8. 左侧常驻索引 ---------- */
.rail{
  position:sticky;
  top:var(--rail-top);
  align-self:start;
}
.rail__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--grey);
  text-transform:uppercase;
}
.rail__list{display:grid;gap:2px;border-left:1px solid var(--line-soft)}
.rail__link{
  position:relative;
  display:block;
  padding:10px 0 10px 18px;
  font-size:14.5px;
  letter-spacing:.04em;
  color:var(--grey);
  transition:color var(--dur) var(--ease);
}
.rail__link::before{
  content:"";
  position:absolute;
  left:-1px;top:8px;bottom:8px;
  width:2px;
  background:transparent;
  transition:background var(--dur) var(--ease);
}
.rail__link:hover{color:var(--cream)}
.rail__link.is-active{color:var(--gold-lt)}
.rail__link.is-active::before{background:linear-gradient(180deg,var(--gold),var(--cyan))}

/* ---------- 9. 排版 ---------- */
.display-xl{
  font-size:var(--fs-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--cream);
}
.display{
  font-size:var(--fs-h1);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--cream);
}
.h-section{
  font-size:var(--fs-h2);
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.32;
  color:var(--cream);
}
.h3{
  font-size:var(--fs-h3);
  font-weight:700;
  line-height:1.45;
  color:var(--cream);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--gold);
  text-transform:uppercase;
}
.mono{font-family:var(--font-mono);letter-spacing:.08em}
.note{
  font-family:var(--font-mono);
  font-size:var(--fs-note);
  letter-spacing:.24em;
  color:var(--grey);
}
.lede{
  max-width:62ch;
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.9;
  color:rgba(242,232,213,.86);
}
p{max-width:70ch}
.text-gold{color:var(--gold-lt)}
.text-cyan{color:var(--cyan)}
.text-grey{color:var(--grey)}
.hairline{height:1px;border:0;background:var(--line)}
.slash-band{
  height:clamp(26px,4vw,52px);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  background:repeating-linear-gradient(115deg,transparent 0 22px,rgba(201,162,39,.10) 22px 23px);
}
.edge-label{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--gold);
  text-transform:uppercase;
}
.section-head{display:grid;gap:10px;margin-bottom:clamp(26px,4vw,48px)}

/* ---------- 10. 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.08em;
  border:1px solid var(--line);
  color:var(--cream);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{border-color:var(--line-strong);color:var(--gold-lt)}
.btn--gold{
  background:linear-gradient(135deg,var(--gold-lt),var(--gold));
  color:var(--ink);
  border-color:transparent;
}
.btn--gold:hover{color:var(--ink);filter:brightness(1.07)}
.btn--ghost{background:rgba(30,30,38,.72)}
.btn--cyan{background:var(--cyan);color:var(--ink);border-color:transparent}
.btn--cyan:hover{color:var(--ink);filter:brightness(1.07)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  border:1px solid var(--line);
  color:var(--gold-lt);
  background:rgba(201,162,39,.10);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
}
.tag--violet{color:#C9B6FF;border-color:rgba(123,77,255,.6);background:rgba(123,77,255,.14)}
.tag--cyan{color:var(--cyan);border-color:rgba(53,224,214,.45);background:rgba(53,224,214,.08)}
.tag--gold{color:var(--gold-lt);border-color:var(--line);background:rgba(201,162,39,.10)}
.tag--red{color:#F0A79F;border-color:rgba(192,57,43,.62);background:rgba(192,57,43,.14)}

/* ---------- 11. 卡片 / 图文容器 ---------- */
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(20px,2.4vw,28px);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.card--flat{
  clip-path:none;
  border-color:var(--line-soft);
  background:rgba(30,30,38,.66);
}
.card__title{
  font-size:var(--fs-h3);
  font-weight:900;
  line-height:1.4;
  color:var(--cream);
}
.card__meta{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--grey);
}
.card__body{margin-top:14px;font-size:15px;color:rgba(242,232,213,.82)}

.figure{
  position:relative;
  margin:0;
  background:var(--ink-2);
  border:1px solid var(--line-soft);
  overflow:hidden;
}
.figure__frame{
  position:relative;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(150deg,rgba(201,162,39,.10),rgba(53,224,214,.06) 58%,transparent),
    linear-gradient(180deg,#191922,#0D0D12);
  overflow:hidden;
}
.figure__frame img{width:100%;height:100%;object-fit:cover}
.figure__frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(10,10,12,.22) 0 1px,transparent 1px 4px);
  opacity:.5;
}
.figure__watermark{
  position:absolute;
  top:10px;right:12px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(242,232,213,.55);
}
.figure__caption{
  padding:12px 14px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--grey);
}
.figure--wide .figure__frame{aspect-ratio:21 / 9}
.figure--tall .figure__frame{aspect-ratio:3 / 4}
.figure--square .figure__frame{aspect-ratio:1 / 1}

/* ---------- 12. 数据块 / 面包屑 ---------- */
.stat{display:grid;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(28px,3.4vw,40px);
  font-weight:500;
  letter-spacing:-.01em;
  line-height:1.1;
  color:var(--cyan);
}
.stat__label{font-size:13px;letter-spacing:.08em;color:var(--grey)}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--grey);
}
.crumbs a{transition:color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--gold-lt)}
.crumbs__sep{color:rgba(138,138,150,.6)}

/* ---------- 13. 入场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(8px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1024px){
  .split,.split--index,.split--reflow{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;top:auto}
  .rail__list{border-left:0;border-top:1px solid var(--line-soft);padding-top:8px}
  .rail__link{padding-left:0}
  .rail__link::before{left:0;top:auto;bottom:0;width:16px;height:2px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:900px){
  .masthead__inner{
    grid-template-columns:minmax(0,1fr) auto;
    padding:12px var(--gutter);
    gap:10px 14px;
  }
  .masthead__meta{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;right:0;
    max-height:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    background:var(--ink-2);
    border-top:1px solid var(--line);
    box-shadow:0 28px 56px rgba(0,0,0,.62);
    transition:max-height .34s var(--ease),opacity .34s var(--ease),visibility .34s var(--ease);
  }
  .site-nav[data-open]{
    max-height:min(78vh,560px);
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }
  .site-nav__list{
    flex-direction:column;
    gap:0;
    padding:6px var(--gutter) 20px;
  }
  .site-nav__item{border-bottom:1px solid var(--line-soft)}
  .site-nav__link{padding:16px 4px;font-size:16px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{padding-left:20px;color:var(--gold-lt)}
  .site-nav__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:10px;height:2px;
    margin-top:-1px;
    background:linear-gradient(90deg,var(--gold),var(--cyan));
  }
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

@media (max-width:640px){
  .brand__sub{display:none}
  .utility__link--accent{display:none}
  .status-strip__inner{padding:7px var(--gutter)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-contact__line{flex-direction:column;gap:2px}
  .footer-legal__note{font-size:12.5px}
  .figure--wide .figure__frame{aspect-ratio:16 / 9}
}

/* 打印与降级 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
  .site-nav{transition:none}
}