/* ============================================================
   星力电玩 · 共享站套件 site.css
   夜间电玩厅 × 数据仪表盘 / 堆叠展板 + 框架式导航
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0B1030;
  --ink-deep:#070A1F;
  --ink-2:#0A0E28;
  --teal:#063B43;
  --wine:#3A1028;
  --panel:#151B3D;
  --panel-2:#1B2350;
  --violet:#7B4DFF;
  --cyan:#2EE6D6;
  --gold:#F2B84B;
  --white:#F4F7FF;
  --muted:#AEB8D9;
  --line:#2A3566;
  --ok:#55D98A;
  --warn:#FF8A5C;

  --radius:14px;
  --radius-sm:10px;
  --cut:18px;

  --font-display:"Oswald","Bebas Neue","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,"Courier New",monospace;

  --header-h:76px;
  --container:1240px;
  --glow-violet:0 0 0 1px rgba(123,77,255,.42), 0 14px 34px -16px rgba(123,77,255,.85);
  --glow-cyan:0 0 0 1px rgba(46,230,214,.42), 0 14px 34px -16px rgba(46,230,214,.7);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,fieldset{ margin:0; }
ul[class],ol[class]{ margin:0; padding:0; list-style:none; }
img,svg,picture,video{ display:block; max-width:100%; }
button{ font:inherit; color:inherit; background:none; border:0; }
a{ color:inherit; text-decoration:none; }
table{ border-collapse:collapse; width:100%; }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:3px; border-radius:4px; }

/* ---------- 3. 中文排版与页面底色 ---------- */
body{
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(to bottom, rgba(120,160,255,.032) 0 1px, transparent 1px 3px),
    radial-gradient(1400px 720px at 10% -10%, rgba(123,77,255,.30), transparent 62%),
    radial-gradient(1100px 620px at 94% 2%, rgba(46,230,214,.16), transparent 60%);
  background-repeat:repeat, no-repeat, no-repeat;
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body.nav-open{ overflow:hidden; }

h1,h2,h3,h4,h5,h6{ font-weight:600; line-height:1.18; color:var(--white); }
h1{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:.95;
  text-wrap:balance;
}
h2,h3{ font-family:var(--font-serif); line-height:1.15; text-wrap:balance; }
h4,h5,h6{ font-family:var(--font-body); letter-spacing:.02em; }
p{ text-wrap:pretty; }

.mono{ font-family:var(--font-mono); letter-spacing:.05em; font-size:13px; }
.muted{ color:var(--muted); }
.lead{ font-size:clamp(16px,1.6vw,19px); line-height:1.85; color:#DCE3F7; max-width:70ch; }

/* ---------- 4. 布局底座 ---------- */
.container{
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:clamp(16px,3.5vw,32px);
}
.section{ padding-block:clamp(44px,6vw,96px); }
.section--tight{ padding-block:clamp(26px,4vw,56px); }
.section--flush{ padding-block:0; }

.grid{ display:grid; gap:clamp(16px,2.4vw,28px); }
.grid-12{ grid-template-columns:repeat(12,minmax(0,1fr)); }
.span-4{ grid-column:span 4; }
.span-5{ grid-column:span 5; }
.span-6{ grid-column:span 6; }
.span-7{ grid-column:span 7; }
.span-8{ grid-column:span 8; }
.span-12{ grid-column:span 12; }
@media (max-width:900px){
  .grid-12 > *{ grid-column:1 / -1; }
}
.stack > * + *{ margin-top:var(--stack-gap,1.1em); }
.divider{
  height:1px;
  border:0;
  margin:clamp(32px,5vw,56px) 0;
  background:linear-gradient(90deg,transparent,var(--line) 10%,var(--line) 90%,transparent);
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:999;
  padding:10px 18px;
  border-radius:8px;
  background:var(--cyan);
  color:#06121A;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{ transform:translateY(0); }

/* ---------- 6. 头部：框架式霓虹横梁 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:200;
  background:rgba(9,13,38,.86);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid var(--line);
  color:var(--white);
  transition:background .24s ease, box-shadow .24s ease;
}
.site-header::before{
  content:"";
  position:absolute;
  left:0; top:0; bottom:0;
  width:3px;
  background:linear-gradient(180deg,var(--cyan),var(--violet) 62%,var(--gold));
  opacity:.92;
  pointer-events:none;
}
.site-header.is-stuck{
  background:rgba(8,11,33,.95);
  box-shadow:0 16px 44px -26px rgba(0,0,0,.98), 0 1px 0 rgba(46,230,214,.18);
}
.header-rail{
  position:absolute;
  left:0; right:0; bottom:-1px;
  height:2px;
  background:rgba(42,53,102,.5);
  overflow:hidden;
  pointer-events:none;
}
.header-rail-line{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 68%,var(--gold));
  box-shadow:0 0 12px rgba(46,230,214,.85);
  will-change:transform;
}
.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  min-height:var(--header-h);
  padding:10px clamp(14px,3vw,32px);
}

/* 品牌锁形 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:inherit;
  text-decoration:none;
}
.brand-mark{
  flex:none;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,var(--violet),#4B8BFF 58%,var(--cyan));
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  box-shadow:0 0 24px -8px rgba(123,77,255,.95);
}
.brand-mark-glyph{
  font-family:var(--font-serif);
  font-weight:700;
  font-size:21px;
  line-height:1;
  color:#080B24;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.1; min-width:0; }
.brand-name{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--white);
}
.brand-tagline{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.07em;
  color:var(--muted);
  white-space:nowrap;
}
.brand:hover .brand-mark{ box-shadow:0 0 30px -4px rgba(46,230,214,.9); }

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border-radius:var(--radius-sm);
  background:rgba(123,77,255,.15);
  border:1px solid rgba(123,77,255,.5);
  color:var(--white);
  font-family:var(--font-body);
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.06em;
  cursor:pointer;
  transition:border-color .2s ease, background .2s ease;
}
.nav-toggle:hover{ border-color:var(--cyan); background:rgba(46,230,214,.14); }
.nav-toggle-bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:18px;
  height:14px;
}
.nav-toggle-bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .24s ease, opacity .18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,20px);
  margin-left:auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-item{ display:block; }
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 11px;
  border-radius:9px;
  font-size:13.5px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .18s ease, background .18s ease;
}
.nav-link:hover{ color:var(--white); background:rgba(123,77,255,.18); }
.nav-link-index{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.06em;
  color:var(--violet);
  opacity:.9;
}
.nav-link[aria-current="page"]{ color:var(--cyan); background:rgba(46,230,214,.10); }
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:11px; right:11px; bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  box-shadow:0 0 10px rgba(46,230,214,.9);
}
.nav-link[aria-current="page"] .nav-link-index{ color:var(--cyan); }

.nav-actions{
  display:flex;
  align-items:center;
  gap:8px;
  padding-left:clamp(8px,1.4vw,18px);
  border-left:1px solid var(--line);
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.72em 1.15em;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.3;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn:active{ transform:translateY(0); }
.btn--primary{
  background:linear-gradient(135deg,var(--violet),#5B2EE6);
  color:#fff;
  box-shadow:var(--glow-violet);
}
.btn--primary:hover{ box-shadow:0 0 0 1px var(--cyan), 0 16px 34px -14px rgba(46,230,214,.75); }
.btn--ghost{
  background:rgba(46,230,214,.07);
  border-color:rgba(46,230,214,.42);
  color:var(--cyan);
}
.btn--ghost:hover{ background:rgba(46,230,214,.16); border-color:var(--cyan); color:var(--white); }
.btn--gold{
  background:linear-gradient(135deg,var(--gold),#D9972E);
  color:#1A1205;
  box-shadow:0 0 0 1px rgba(242,184,75,.5), 0 14px 30px -16px rgba(242,184,75,.85);
}

/* ---------- 8. 通用展示组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:currentColor;
  opacity:.85;
}

.plate{
  display:inline-flex;
  align-items:baseline;
  gap:.75em;
  padding:6px 12px;
  background:var(--panel);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--white);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}
.plate b{ color:var(--gold); font-weight:600; }

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.25em .72em;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(42,53,102,.36);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.09em;
  line-height:1.6;
}
.tag--cyan{ color:var(--cyan); border-color:rgba(46,230,214,.45); background:rgba(46,230,214,.09); }
.tag--gold{ color:var(--gold); border-color:rgba(242,184,75,.45); background:rgba(242,184,75,.10); }
.tag--ok{ color:var(--ok); border-color:rgba(85,217,138,.45); background:rgba(85,217,138,.10); }
.tag--warn{ color:var(--warn); border-color:rgba(255,138,92,.45); background:rgba(255,138,92,.10); }

.glass{
  background:linear-gradient(150deg,rgba(28,36,80,.74),rgba(15,20,52,.88));
  border:1px solid rgba(123,77,255,.28);
  border-radius:var(--radius);
  -webkit-backdrop-filter:blur(10px) saturate(130%);
  backdrop-filter:blur(10px) saturate(130%);
  box-shadow:0 26px 62px -34px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.06);
}
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.card{
  position:relative;
  padding:clamp(18px,2.2vw,28px);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
  transition:border-color .22s ease, box-shadow .22s ease, transform .22s ease;
}
.card:hover{
  border-color:rgba(46,230,214,.5);
  box-shadow:0 22px 52px -30px rgba(46,230,214,.8);
  transform:translateY(-2px);
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px clamp(24px,4vw,56px);
  margin-bottom:clamp(24px,3vw,40px);
}
.section-title{
  font-family:var(--font-serif);
  font-size:clamp(26px,3.2vw,44px);
  line-height:1.12;
  letter-spacing:.01em;
  margin:0;
}
.section-note{
  max-width:48ch;
  margin:0;
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}

/* 图片容器基础规则（页面阶段填 <img> 或占位层） */
.media-frame{
  position:relative;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(140deg,rgba(123,77,255,.28),rgba(46,230,214,.12) 55%,rgba(11,16,48,.94)),
    var(--ink-2);
  isolation:isolate;
}
.media-frame img,
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(to bottom,rgba(46,230,214,.10) 0 1px,transparent 1px 4px);
  opacity:.5;
  mix-blend-mode:screen;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame--square{ aspect-ratio:1 / 1; }

/* 面包屑 */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumb ol{ display:flex; flex-wrap:wrap; gap:.55em; }
.breadcrumb li{ display:flex; align-items:center; gap:.55em; }
.breadcrumb li + li::before{ content:"/"; color:var(--line); }
.breadcrumb a{ color:var(--muted); transition:color .16s ease; }
.breadcrumb a:hover{ color:var(--cyan); }
.breadcrumb [aria-current="page"]{ color:var(--white); }

/* 长文 */
.prose{
  max-width:72ch;
  font-size:17px;
  line-height:1.85;
  color:#DCE3F7;
}
.prose > * + *{ margin-top:1.05em; }
.prose h2,
.prose h3{ margin-top:1.9em; margin-bottom:.45em; color:var(--white); }
.prose ul,
.prose ol{ padding-left:1.3em; }
.prose li + li{ margin-top:.4em; }
.prose a{
  color:var(--cyan);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  text-decoration-color:rgba(46,230,214,.5);
}
.prose a:hover{ text-decoration-color:var(--cyan); }
.prose strong{ color:var(--white); font-weight:600; }
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  padding:.1em .4em;
  border-radius:5px;
  background:rgba(123,77,255,.16);
  color:var(--cyan);
}

/* ---------- 9. 可展开内容组 ---------- */
.expand{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(21,27,61,.74);
  overflow:hidden;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.expand + .expand{ margin-top:10px; }
.expand[data-open]{
  border-color:rgba(46,230,214,.45);
  box-shadow:0 0 0 1px rgba(46,230,214,.16), 0 18px 42px -30px rgba(46,230,214,.8);
}
.expand-trigger{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:16px 18px;
  text-align:left;
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:500;
  line-height:1.5;
  cursor:pointer;
  transition:background .18s ease;
}
.expand-trigger:hover{ background:rgba(123,77,255,.12); }
.expand-title{ flex:1 1 auto; min-width:0; }
.expand-icon{
  position:relative;
  flex:none;
  width:20px;
  height:20px;
  border-radius:50%;
  border:1px solid rgba(46,230,214,.55);
}
.expand-icon::before{
  content:"";
  position:absolute;
  left:5px; right:5px; top:50%;
  height:1.5px;
  margin-top:-.75px;
  background:var(--cyan);
}
.expand-icon::after{
  content:"";
  position:absolute;
  top:5px; bottom:5px; left:50%;
  width:1.5px;
  margin-left:-.75px;
  background:var(--cyan);
  transition:transform .24s ease, opacity .24s ease;
}
.expand-trigger[aria-expanded="true"] .expand-icon::after{ transform:scaleY(0); opacity:0; }
.expand-panel[hidden]{ display:none; }
.expand-panel:not([hidden]){ animation:panelIn .26s ease-out both; }
@keyframes panelIn{
  from{ opacity:0; transform:translateY(-6px); }
  to{ opacity:1; transform:translateY(0); }
}
.expand-body{
  padding:0 18px 18px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
}
.expand-body > * + *{ margin-top:.7em; }

/* ---------- 10. 显现动画 ---------- */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease, transform .6s cubic-bezier(.22,1,.36,1);
}
.reveal.is-visible{ opacity:1; transform:none; }

/* ---------- 11. 页脚展区 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,140px);
  overflow:hidden;
  color:var(--white);
  border-top:1px solid var(--line);
  background:
    radial-gradient(900px 440px at 12% 0%,rgba(58,16,40,.88),transparent 62%),
    radial-gradient(820px 420px at 88% 8%,rgba(6,59,67,.82),transparent 64%),
    linear-gradient(180deg,#0A0E28,var(--ink-deep));
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0; left:0; right:0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--violet) 18%,var(--cyan) 50%,var(--gold) 82%,transparent);
  opacity:.88;
}
.footer-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,4.5fr) minmax(0,7.5fr);
  gap:clamp(32px,4vw,64px);
  align-items:start;
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding:clamp(48px,6vw,84px) clamp(16px,3.5vw,32px) clamp(32px,4vw,52px);
}
.footer-brand{ min-width:0; }
.footer-summary{
  margin-top:20px;
  max-width:36ch;
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}
.footer-facts{
  display:grid;
  gap:10px;
  margin-top:24px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--muted);
  line-height:1.7;
}
.footer-fact{ display:flex; gap:12px; align-items:baseline; }
.footer-fact-key{
  flex:none;
  width:3.6em;
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--violet);
  text-transform:uppercase;
}
.footer-fact > span:last-child{ min-width:0; word-break:break-word; }

.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col{ min-width:0; }
.footer-col-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-links{ display:grid; gap:10px; }
.footer-link{
  display:inline-block;
  color:var(--muted);
  font-size:14.5px;
  line-height:1.6;
  transition:color .16s ease, transform .16s ease;
}
.footer-link:hover{ color:var(--white); transform:translateX(3px); }

.footer-meta{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding:20px clamp(16px,3.5vw,32px) clamp(28px,4vw,44px);
  border-top:1px solid rgba(42,53,102,.72);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.footer-copy{ margin:0; }
.footer-icp{ margin:0; color:rgba(174,184,217,.78); }
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin-left:auto;
}
.footer-meta-link{ color:var(--muted); transition:color .16s ease; }
.footer-meta-link:hover{ color:var(--cyan); }

/* ---------- 12. 响应式 ---------- */
@media (max-width:1180px){
  .brand-tagline{ display:none; }
  .nav-link{ padding:9px 9px; font-size:13px; }
  .nav-link-index{ display:none; }
}
@media (max-width:1080px){
  .nav-toggle{ display:inline-flex; }
  .site-nav{
    position:fixed;
    top:calc(var(--header-h) + 1px);
    right:0;
    width:min(86vw,368px);
    height:calc(100vh - var(--header-h) - 1px);
    height:calc(100dvh - var(--header-h) - 1px);
    margin-left:0;
    padding:22px 20px 36px;
    flex-direction:column;
    align-items:stretch;
    gap:18px;
    overflow-y:auto;
    overscroll-behavior:contain;
    background:linear-gradient(170deg,#10163C,#0A0E28 72%);
    border-left:1px solid rgba(123,77,255,.42);
    box-shadow:-34px 0 76px -24px rgba(0,0,0,.95);
    transform:translateX(102%);
    visibility:hidden;
    transition:transform .28s cubic-bezier(.4,0,.2,1), visibility .28s;
  }
  .site-nav[data-open]{
    transform:translateX(0);
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-item + .nav-item{ border-top:1px solid rgba(42,53,102,.55); }
  .nav-link{
    justify-content:flex-start;
    padding:14px 12px;
    border-radius:10px;
    font-size:16px;
    color:var(--white);
  }
  .nav-link-index{ display:inline; font-size:11px; }
  .nav-link[aria-current="page"]::after{ left:12px; right:12px; bottom:7px; }
  .nav-actions{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding-left:0;
    padding-top:18px;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .nav-actions .btn{ width:100%; padding:13px 16px; }
  .footer-inner{ grid-template-columns:1fr; }
}
@media (max-width:900px){
  .span-4,.span-5,.span-6,.span-7,.span-8{ grid-column:1 / -1; }
}
@media (max-width:720px){
  :root{ --header-h:64px; }
  .brand-mark{ width:36px; height:36px; }
  .brand-mark-glyph{ font-size:18px; }
  .brand-name{ font-size:17px; letter-spacing:.1em; }
  .header-inner{ gap:10px; }
  .nav-toggle-text{ display:none; }
  .nav-toggle{ padding:10px; }
  .footer-nav{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .footer-legal{ margin-left:0; width:100%; }
  .prose{ font-size:16px; }
  .lead{ font-size:16px; }
}
@media (max-width:420px){
  .footer-nav{ grid-template-columns:1fr; }
}

/* ---------- 13. 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal{ opacity:1 !important; transform:none !important; }
  .header-rail-line{ box-shadow:none; }
  .btn:hover,
  .card:hover,
  .footer-link:hover{ transform:none; }
}

/* ---------- 14. 打印 ---------- */
@media print{
  .site-header,.site-footer,.skip-link,.nav-toggle{ display:none !important; }
  body{ background:#fff; color:#000; }
}