/* ============================================================
   博九娱乐 · 共享 Site Kit（/assets/site.css）
   夜间娱乐控制台：深墨蓝底 + 霓虹青/电光紫光晕 + 暖金强调
   ============================================================ */

:root{
  --ink:#071426;
  --ink-2:#0E2138;
  --ink-3:#132B47;
  --cyan:#38E0D0;
  --violet:#8B5CF6;
  --gold:#F4B860;
  --mist:#E8EEF6;
  --slate:#9FB0C6;
  --mint:#5FE3A1;
  --wine:#7A2E4A;
  --glass:rgba(27,46,74,.4);
  --line:rgba(159,176,198,.18);
  --line-cyan:rgba(56,224,208,.42);
  --line-violet:rgba(139,92,246,.42);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
  --shadow-1:0 18px 44px rgba(3,10,20,.55);
  --shadow-cyan:0 12px 34px rgba(56,224,208,.2);
  --shadow-violet:0 14px 34px rgba(139,92,246,.3);
  --container:1240px;
  --gutter:clamp(18px,4vw,48px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"HarmonyOS Sans SC","MiSans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,Arial,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- reset ---------- */
*,*::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,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(56,224,208,.32);color:#04121E}

/* ---------- 页面底屏 ---------- */
body{
  font-family:var(--font-body);
  font-size:clamp(15px,.95vw,17px);
  line-height:1.75;
  color:var(--mist);
  background-color:var(--ink);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:-10%;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(closest-side at 14% 4%, rgba(56,224,208,.18), transparent 70%),
    radial-gradient(closest-side at 88% 10%, rgba(139,92,246,.22), transparent 72%),
    radial-gradient(closest-side at 60% 104%, rgba(122,46,74,.28), transparent 74%);
  animation:auraBreathe 22s ease-in-out infinite;
}
@keyframes auraBreathe{
  0%,100%{opacity:.62;transform:scale(1)}
  50%{opacity:1;transform:scale(1.05)}
}
main{position:relative;z-index:1;display:block}

/* ---------- 排版 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(38px,6.2vw,88px);
  line-height:1.03;
  letter-spacing:-.02em;
  color:var(--mist);
}
.display-thin{display:block;font-weight:250;color:var(--slate)}
.section-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(24px,3vw,38px);
  line-height:1.18;
  letter-spacing:-.01em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.lede{font-size:clamp(16px,1.3vw,20px);line-height:1.72;color:var(--slate);max-width:56ch}
.prose{max-width:68ch;color:var(--mist)}
.prose p + p{margin-top:1em}
.note{
  font-size:13.5px;
  line-height:1.7;
  color:var(--slate);
  border-left:2px solid var(--violet);
  padding-left:14px;
}
.divider{height:1px;border:0;background:linear-gradient(90deg,var(--line-cyan),rgba(139,92,246,.35),transparent);margin:0}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(44px,6.5vw,96px)}
.section-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:18px;margin-bottom:clamp(22px,3vw,40px)}
.layout-editorial{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:clamp(24px,4vw,56px);align-items:start}
.col-main{min-width:0}
.col-aside{min-width:0}
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}

/* ---------- 头部 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-64px;
  z-index:200;
  padding:10px 18px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:#04121E;
  font-size:13px;
  font-weight:700;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0}
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(7,20,38,.97),rgba(10,26,47,.88));
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
}
.header-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(56,224,208,.1);
  overflow:hidden;
}
.header-progress span{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 58%,var(--gold));
  will-change:transform;
}
.header-inner{
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding:16px var(--gutter);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:clamp(14px,2.4vw,36px);
  transition:padding .24s var(--ease);
}
.site-header[data-condensed] .header-inner{padding-block:8px}
.brand-block{display:flex;align-items:center;gap:clamp(12px,2vw,28px);min-width:0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:11px;
  background:conic-gradient(from 210deg,var(--cyan),var(--violet) 45%,var(--gold) 72%,var(--cyan));
  box-shadow:inset 0 0 0 1px rgba(232,238,246,.18),0 8px 22px rgba(56,224,208,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;min-width:0}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--mist)}
.brand-line{font-size:11px;letter-spacing:.14em;color:var(--slate)}
.category-entry{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 15px;
  border-radius:999px;
  border:1px solid rgba(56,224,208,.34);
  background:rgba(56,224,208,.07);
  font-size:12px;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.category-entry:hover{background:rgba(56,224,208,.15);border-color:var(--cyan);transform:translateY(-2px)}
.category-entry-label{font-weight:700;letter-spacing:.14em;color:var(--cyan)}
.category-entry-text{color:var(--mist);white-space:nowrap}
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border-radius:999px;
  border:1px solid var(--line-cyan);
  background:rgba(27,46,74,.45);
  color:var(--mist);
  font-size:13px;
  letter-spacing:.12em;
}
.nav-toggle[aria-expanded="true"]{border-color:var(--gold);color:var(--gold)}
.nav-toggle-text{font-weight:700}
.nav-toggle-bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-panel{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,34px);
  margin-left:auto;
}
.nav-panel::before{
  content:"";
  width:1px;
  height:28px;
  background:linear-gradient(180deg,transparent,var(--cyan),transparent);
  opacity:.75;
}
.site-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(10px,1.5vw,26px);flex-wrap:wrap}
.nav-link{
  position:relative;
  display:inline-block;
  padding:7px 2px;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--slate);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--mist)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan);font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-aside{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.version-hint{
  max-width:15ch;
  font-size:11px;
  line-height:1.5;
  letter-spacing:.08em;
  color:var(--slate);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:999px;
  border:1px solid transparent;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  line-height:1;
  letter-spacing:.04em;
  cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  background:linear-gradient(120deg,var(--cyan),var(--violet));
  color:#04121E;
  box-shadow:0 10px 26px rgba(56,224,208,.2);
}
.btn-primary:hover{box-shadow:var(--shadow-violet)}
.btn-ghost{
  border-color:rgba(159,176,198,.34);
  background:rgba(27,46,74,.5);
  color:var(--mist);
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-gold{
  background:linear-gradient(120deg,var(--gold),#FFD79A);
  color:#2B1806;
  box-shadow:0 10px 26px rgba(244,184,96,.22);
}

/* ---------- 面板 / 卡片 / 色带 ---------- */
.card{
  background:rgba(14,33,56,.74);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,28px);
  transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-cyan);background:rgba(20,42,70,.82)}
.glass-card{
  background:var(--glass);
  border:1px solid rgba(232,238,246,.12);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.4vw,30px);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1);
}
.panel{
  background:linear-gradient(140deg,rgba(19,43,71,.9),rgba(9,24,44,.86));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(20px,2.8vw,36px);
}
.band{border-radius:var(--radius-lg);padding:clamp(24px,3.6vw,52px)}
.band--wine{background:linear-gradient(120deg,rgba(122,46,74,.55),rgba(122,46,74,.12))}
.band--indigo{background:linear-gradient(120deg,rgba(139,92,246,.28),rgba(56,224,208,.1))}
.band--cyan{background:linear-gradient(120deg,rgba(56,224,208,.16),rgba(14,33,56,.62))}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/9;
  border-radius:var(--radius-lg);
  border:1px solid rgba(232,238,246,.1);
  background:
    radial-gradient(closest-side at 20% 20%, rgba(56,224,208,.22), transparent 70%),
    linear-gradient(120deg,rgba(14,33,56,.9),rgba(139,92,246,.22) 55%,rgba(244,184,96,.16));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--panel{
  aspect-ratio:16/10;
  border-color:var(--line-cyan);
  box-shadow:inset 0 0 0 1px rgba(232,238,246,.08),var(--shadow-1);
}

/* ---------- 索引 / 标签 / 筛选 ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 15px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(27,46,74,.4);
  color:var(--slate);
  font-size:12.5px;
  letter-spacing:.04em;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.chip:hover{color:var(--mist);border-color:var(--line-cyan)}
.chip[aria-pressed="true"]{color:var(--cyan);border-color:var(--cyan);background:rgba(56,224,208,.12)}
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border-radius:7px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  border:1px solid rgba(56,224,208,.34);
  background:rgba(56,224,208,.12);
  color:var(--cyan);
}
.tag--violet{border-color:var(--line-violet);background:rgba(139,92,246,.18);color:#CBBAFF}
.tag--gold{border-color:rgba(244,184,96,.36);background:rgba(244,184,96,.14);color:var(--gold)}
.tag--wine{border-color:rgba(122,46,74,.6);background:rgba(122,46,74,.32);color:#F2B7CD}
.index-list{display:flex;flex-direction:column;gap:2px}
.index-list li{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--slate)}
.toc{position:sticky;top:104px;display:flex;flex-direction:column}
.toc-link{
  display:block;
  padding:10px 0 10px 14px;
  border-left:2px solid var(--line);
  color:var(--slate);
  font-size:14px;
  transition:color .2s var(--ease),border-color .2s var(--ease)
}
.toc-link:hover{color:var(--mist)}
.toc-link[data-active="true"]{border-left-color:var(--gold);color:var(--mist)}
[data-section]{scroll-margin-top:112px}

/* ---------- 折叠内容组 ---------- */
.accordion{border-top:1px solid var(--line)}
.accordion-item{border-bottom:1px solid var(--line)}
.accordion-trigger{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 0;
  text-align:left;
  font-family:var(--font-display);
  font-size:clamp(16px,1.5vw,20px);
  font-weight:700;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.accordion-trigger:hover{color:var(--cyan)}
.accordion-icon{
  position:relative;
  width:22px;height:22px;flex:none;
  border-radius:50%;
  border:1px solid var(--line-cyan);
}
.accordion-icon::before,
.accordion-icon::after{
  content:"";
  position:absolute;
  left:5px;right:5px;
  top:50%;
  height:1.6px;
  background:var(--cyan);
  transform:translateY(-50%);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.accordion-icon::after{transform:translateY(-50%) rotate(90deg)}
.accordion-item[data-open] .accordion-icon::after{opacity:0;transform:translateY(-50%) rotate(0deg)}
.accordion-item[data-open] .accordion-trigger{color:var(--cyan)}
.accordion-panel{
  display:grid;
  grid-template-rows:0fr;
  visibility:hidden;
  transition:grid-template-rows .32s var(--ease),visibility .32s var(--ease);
}
.accordion-item[data-open] .accordion-panel{grid-template-rows:1fr;visibility:visible}
.accordion-panel-inner{overflow:hidden}

/* ---------- 版本对照表 ---------- */
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:rgba(14,33,56,.6)}
.compare{min-width:620px;font-size:14.5px}
.compare caption{
  padding:16px 18px;
  text-align:left;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--slate);
  border-bottom:1px solid var(--line);
}
.compare th,.compare td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.compare thead th{font-size:12px;letter-spacing:.14em;color:var(--slate);white-space:nowrap}
.compare tbody tr:last-child td{border-bottom:0}
.compare tbody tr:hover{background:rgba(56,224,208,.05)}
.compare .is-old{border-left:2px solid rgba(159,176,198,.45);color:var(--slate)}
.compare .is-new{border-left:2px solid var(--violet);background:rgba(139,92,246,.08)}

/* ---------- 数据块 ---------- */
.stat-grid{
  display:grid;
  grid-template-columns:1.25fr .9fr 1.05fr .85fr;
  gap:clamp(16px,2.4vw,32px);
}
.stat{padding-top:18px;border-top:2px solid var(--line-cyan)}
.stat-value{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4.2vw,62px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--mist);
}
.stat-label{margin-top:10px;font-size:12px;letter-spacing:.14em;color:var(--slate)}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;color:var(--slate)}
.breadcrumb li{display:flex;align-items:center;gap:10px}
.breadcrumb li + li::before{content:"/";color:rgba(159,176,198,.5)}
.breadcrumb a:hover{color:var(--cyan)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,8vw,120px);
  overflow:hidden;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,33,56,.94),rgba(7,20,38,.99));
}
.footer-glow{
  position:absolute;
  left:-10%;right:-10%;bottom:-45%;
  height:360px;
  pointer-events:none;
  background:
    radial-gradient(closest-side at 25% 40%, rgba(139,92,246,.4), transparent 72%),
    radial-gradient(closest-side at 78% 55%, rgba(122,46,74,.45), transparent 74%),
    radial-gradient(closest-side at 52% 30%, rgba(56,224,208,.18), transparent 70%);
  animation:auraBreathe 22s ease-in-out infinite;
}
.footer-inner{
  position:relative;
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding:clamp(40px,6vw,78px) var(--gutter) 30px;
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.35fr;
  gap:clamp(24px,3.6vw,56px);
}
.footer-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer-col--brand{padding-right:clamp(0px,2vw,32px);border-right:1px solid var(--line)}
.footer-col-title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-brand-name{font-family:var(--font-display);font-weight:900;font-size:22px;letter-spacing:-.01em;color:var(--mist)}
.footer-brand-line{font-size:12px;letter-spacing:.12em;color:var(--slate)}
.footer-note{font-size:13.5px;line-height:1.75;color:var(--slate);max-width:34ch}
.footer-icp{
  align-self:flex-start;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line-violet);
  background:rgba(139,92,246,.12);
  font-size:11.5px;
  letter-spacing:.08em;
  color:#CBBAFF;
}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-list-item{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:8px 0;
  font-size:14px;
  color:var(--slate);
  border-bottom:1px dashed rgba(159,176,198,.12);
}
.footer-list-item a{transition:color .18s var(--ease)}
.footer-list-item a:hover{color:var(--cyan)}
.footer-index-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:11.5px;
  color:rgba(159,176,198,.75);
}
.footer-contact{display:flex;flex-direction:column;gap:2px}
.footer-contact-item{display:flex;flex-direction:column;gap:2px;padding:8px 0;border-bottom:1px dashed rgba(159,176,198,.12)}
.footer-label{font-size:11px;letter-spacing:.14em;color:var(--slate)}
.footer-value{font-size:14px;color:var(--mist);word-break:break-word}
.footer-col .btn{align-self:flex-start;margin-top:6px}
.footer-bottom{
  position:relative;
  width:100%;
  max-width:var(--container);
  margin-inline:auto;
  padding:18px var(--gutter) 26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  font-size:12.5px;
  color:var(--slate);
}
.footer-copyright{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal a:hover{color:var(--cyan)}
.footer-hours{letter-spacing:.06em}

/* ---------- 滚动显现 ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .56s var(--ease),transform .56s var(--ease)}
.js-ready [data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .site-header .header-inner{position:relative}
  .nav-toggle{display:inline-flex;order:3}
  .brand-block{order:1}
  .nav-panel{
    order:4;
    flex-basis:100%;
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:16px;
    margin-left:0;
    max-height:0;
    padding-block:0;
    overflow:hidden;
    visibility:hidden;
    opacity:0;
    border-top:1px solid transparent;
    transition:max-height .32s var(--ease),opacity .22s var(--ease),padding .22s var(--ease),visibility .22s var(--ease);
  }
  .nav-panel::before{display:none}
  .nav-panel[data-open]{
    max-height:78vh;
    padding-block:18px 8px;
    overflow-y:auto;
    visibility:visible;
    opacity:1;
    border-top-color:var(--line-cyan);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-link{width:100%;padding:13px 0;font-size:17px;border-bottom:1px solid var(--line)}
  .nav-aside{width:100%;gap:10px}
  .version-hint{max-width:100%}
  .layout-editorial{grid-template-columns:minmax(0,1fr)}
  .toc{position:static}
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .footer-col--brand{grid-column:1 / -1;border-right:0;border-bottom:1px solid var(--line);padding:0 0 22px}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  .brand-line{display:none}
  .category-entry{padding:6px 12px}
  .category-entry-text{display:none}
  .nav-toggle-text{font-size:12px}
  .footer-inner{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .display{font-size:clamp(32px,10vw,52px)}
}

@media (max-width:420px){
  .stat-grid{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  body::before{opacity:.85}
  .js-ready [data-reveal]{opacity:1;transform:none;transition:none}
  .btn:hover,.card:hover,.category-entry:hover{transform:none}
}