/* ==========================================================================
   特色棋牌 · 共享样式 /assets/site.css
   深靛蓝牌桌 · 冷光银结构 · 霓虹青焦点 · 朱砂红序号
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0B1026;
  --ink-2:#121A3A;
  --silver:#E8EDF5;
  --silver-dim:#9AA6BD;
  --cyan:#3DE0E8;
  --ember:#E2453D;
  --arcade-a:#8B5CF6;
  --arcade-b:#F472B6;
  --table:#1F4D3B;
  --gold:#C9A24D;
  --paper:#F7F4EE;
  --track:#2A3355;

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:26px;
  --radius-pill:999px;

  --font-display:"Barlow Condensed","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 88% -10%, rgba(61,224,232,.10), transparent 62%),
    radial-gradient(760px 440px at 2% 8%, rgba(139,92,246,.12), transparent 64%);
  background-repeat:no-repeat;
  color:var(--silver);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
img,svg,video,canvas{max-width:100%;height:auto}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
a{color:var(--cyan);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:var(--cyan);color:var(--ink)}

/* ---------- 3. 中文排版层级 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  margin:0 0 .5em;
  color:var(--silver);
}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:clamp(1.15rem,2vw,1.4rem);letter-spacing:-.01em}
h4{font-size:1.05rem;line-height:1.4}
strong{font-weight:700;color:var(--silver)}
small{font-size:.82rem}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 4. 工具类 ---------- */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:200;
  padding:10px 20px;border-radius:0 0 14px 14px;
  background:var(--cyan);color:var(--ink);
  font-weight:700;font-size:.9rem;text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus{top:0;text-decoration:none}

/* ---------- 6. 站点头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,16,38,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--track);
  transition:box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-scrolled{
  border-bottom-color:rgba(61,224,232,.35);
  box-shadow:0 22px 40px -32px rgba(0,0,0,.95);
}

/* 细信息条 */
.masthead{background:rgba(18,26,58,.62);border-bottom:1px solid rgba(42,51,85,.7)}
.masthead__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:5px var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.masthead__meta{
  margin:0;display:flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--silver-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.masthead__meta--end{letter-spacing:.1em}
.masthead__dot{
  flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--ember);box-shadow:0 0 0 3px rgba(226,69,61,.18);
}

/* 命令栏 */
.commandbar{position:relative}
.commandbar__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:10px var(--gutter);
  display:flex;align-items:center;
  gap:clamp(10px,2vw,28px);
}

/* 品牌锁扣 */
.brand-lockup{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:11px;
  color:var(--silver);text-decoration:none;
}
.brand-lockup:hover{text-decoration:none}
.brand-lockup__mark{
  width:38px;height:38px;flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:13px;
  font-family:var(--font-mono);font-weight:700;font-size:.92rem;letter-spacing:.02em;
  color:var(--cyan);
  border:1px solid rgba(61,224,232,.45);
  background:linear-gradient(150deg,rgba(61,224,232,.18),rgba(139,92,246,.20));
  box-shadow:inset 0 0 0 1px rgba(11,16,38,.65);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.brand-lockup:hover .brand-lockup__mark,
.brand-lockup:focus-visible .brand-lockup__mark{
  border-color:var(--cyan);
  box-shadow:0 0 0 4px rgba(61,224,232,.14);
  transform:translateY(-1px);
}
.brand-lockup__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-lockup__name{
  font-family:var(--font-display);font-weight:900;
  font-size:1.12rem;letter-spacing:.03em;white-space:nowrap;
}
.brand-lockup__tag{
  font-family:var(--font-mono);font-size:.63rem;letter-spacing:.13em;
  color:var(--silver-dim);white-space:nowrap;
}

/* 导航 */
.nav-rail{margin-left:auto;min-width:0}
.nav-rail__list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-rail__item{flex:0 0 auto}
.rail-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 10px;border-radius:var(--radius-pill);
  color:var(--silver-dim);font-size:.9rem;font-weight:500;
  text-decoration:none;white-space:nowrap;
  transition:color .2s ease,background-color .2s ease;
}
.rail-link:hover{color:var(--silver);background:rgba(61,224,232,.08);text-decoration:none}
.rail-link__idx{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.06em;
  color:rgba(154,166,189,.55);transition:color .2s ease;
}
.rail-link:hover .rail-link__idx{color:var(--cyan)}
.rail-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  border-radius:2px;background:var(--cyan);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s ease;
}
.rail-link[aria-current="page"]{
  color:var(--silver);background:rgba(61,224,232,.10);
}
.rail-link[aria-current="page"] .rail-link__idx{color:var(--ember)}
.rail-link[aria-current="page"]::after{transform:scaleX(1)}

/* 命令栏行动按钮 */
.commandbar__cta{flex:0 0 auto;letter-spacing:.02em}

/* 阅读进度条 */
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(42,51,85,.6);pointer-events:none;overflow:hidden;
}
.scroll-meter__fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--arcade-b) 55%,var(--ember));
  transition:transform .12s linear;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  margin-left:auto;padding:8px 15px;
  background:transparent;border:1px solid var(--track);border-radius:var(--radius-pill);
  color:var(--silver);font-size:.85rem;font-weight:600;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:rgba(61,224,232,.6);color:var(--cyan)}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:background-color .2s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:transform .22s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}

/* ---------- 7. 站点页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,rgba(18,26,58,.92),var(--ink) 58%);
  border-top:1px solid var(--track);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;height:2px;
  width:min(440px,62%);
  background:linear-gradient(90deg,var(--cyan),var(--ember) 70%,transparent);
}
.footer-crest{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(30px,6vw,60px) var(--gutter) clamp(18px,3vw,30px);
}
.footer-crest__inner{
  display:grid;gap:clamp(16px,3vw,40px);
  grid-template-columns:minmax(0,1fr);
  align-items:end;
}
.footer-crest__brand{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.footer-crest__mark{
  width:44px;height:44px;flex:0 0 auto;
  display:grid;place-items:center;border-radius:14px;
  font-family:var(--font-mono);font-weight:700;font-size:1rem;
  color:var(--cyan);
  border:1px solid rgba(61,224,232,.4);
  background:linear-gradient(150deg,rgba(61,224,232,.16),rgba(226,69,61,.16));
}
.footer-crest__name{
  margin:0;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.7rem,3.4vw,2.5rem);letter-spacing:-.02em;line-height:1;
}
.footer-crest__tag{
  margin:0;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;
  color:var(--cyan);
}
.footer-crest__lede{
  margin:0;max-width:48ch;
  color:var(--silver-dim);font-size:.95rem;line-height:1.75;
}

.footer-grid{
  max-width:var(--shell);margin-inline:auto;
  padding:0 var(--gutter) clamp(22px,4vw,38px);
  display:grid;gap:clamp(20px,3vw,36px);
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 12px;padding-bottom:9px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;
  color:var(--silver-dim);
  border-bottom:1px solid rgba(42,51,85,.85);
}
.footer-links{display:grid;gap:6px}
.footer-link{
  display:inline-flex;align-items:center;gap:9px;
  padding:3px 0;color:var(--silver);
  font-size:.95rem;text-decoration:none;
  transition:color .18s ease,transform .18s ease;
}
.footer-link::before{
  content:"";width:6px;height:6px;flex:0 0 auto;border-radius:50%;
  background:var(--track);transition:background-color .18s ease;
}
.footer-link:hover{color:var(--cyan);transform:translateX(2px);text-decoration:none}
.footer-link:hover::before{background:var(--cyan)}

.footer-contact{display:grid;gap:9px;font-size:.92rem}
.footer-contact__row{
  margin:0;display:grid;grid-template-columns:3.2em minmax(0,1fr);
  gap:10px;align-items:baseline;
}
.footer-contact__key{
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;
  color:var(--silver-dim);
}
.footer-contact__val{color:var(--silver);line-height:1.6}
.footer-contact__val.mono{font-size:.85rem;letter-spacing:.02em}

.footer-note{
  max-width:var(--shell);margin:0 auto;
  padding:0 var(--gutter) clamp(24px,3vw,36px);
  color:var(--silver-dim);font-size:.8rem;line-height:1.7;
}
.footer-base{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(14px,2vw,20px) var(--gutter) clamp(26px,3vw,38px);
  display:flex;flex-wrap:wrap;gap:8px 24px;
  align-items:center;justify-content:space-between;
  border-top:1px solid rgba(42,51,85,.85);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--silver-dim);
}
.footer-base__legal,.footer-base__year{margin:0}

/* ---------- 8. 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.7em 1.4em;border:1px solid transparent;border-radius:var(--radius-pill);
  font-family:var(--font-body);font-weight:700;font-size:.95rem;line-height:1.3;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--cyan);color:var(--ink);border-color:var(--cyan)}
.btn--primary:hover{box-shadow:0 0 0 4px rgba(61,224,232,.16),0 14px 26px -20px rgba(61,224,232,.9)}
.btn--ghost{background:transparent;color:var(--silver);border-color:var(--track)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--quiet{
  background:transparent;color:var(--cyan);border-color:transparent;
  padding:.4em .2em;border-radius:6px;text-decoration:underline;
  text-underline-offset:4px;text-decoration-thickness:1px;
}
.btn--sm{padding:.52em 1.05em;font-size:.85rem;gap:.4em}
.btn--block{width:100%}

/* ---------- 9. 布局容器与网格 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(30px,6vw,72px)}
.section--tight{padding-block:clamp(18px,3vw,36px)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(12px,2vw,24px)}
.col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 12;min-width:0}

.layout-editorial{display:grid;gap:clamp(20px,4vw,48px);grid-template-columns:minmax(0,1fr);align-items:start}
.layout-editorial--flip{display:grid;gap:clamp(20px,4vw,48px);grid-template-columns:minmax(0,1fr);align-items:start}

.prose{max-width:68ch;font-size:1.05rem;line-height:1.8}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.2em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{text-decoration:underline;text-underline-offset:3px}

/* ---------- 10. 标签、眉标 ---------- */
.eyebrow{
  display:flex;align-items:center;gap:10px;margin:0 0 14px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.22em;
  color:var(--cyan);
}
.eyebrow::before{content:"";flex:0 0 auto;width:22px;height:2px;background:var(--ember)}

.pill{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.24em .8em;border-radius:var(--radius-pill);
  border:1px solid var(--track);background:rgba(42,51,85,.4);
  color:var(--silver-dim);font-size:.75rem;font-weight:600;line-height:1.6;
  white-space:nowrap;
}
.pill--cyan{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.pill--ember{background:var(--ember);border-color:var(--ember);color:var(--paper)}
.pill--arcade{background:linear-gradient(120deg,var(--arcade-a),var(--arcade-b));border-color:transparent;color:#fff}
.pill--table{background:var(--table);border-color:rgba(201,162,77,.7);color:#F2E7C9}

/* ---------- 11. 卡片 ---------- */
.card{
  position:relative;display:block;
  padding:clamp(16px,3vw,26px);
  border:1px solid var(--track);border-radius:var(--radius-l);
  background:linear-gradient(170deg,rgba(18,26,58,.96),rgba(11,16,38,.96));
  color:var(--silver);text-decoration:none;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.card:hover,.card:focus-visible{
  border-color:rgba(61,224,232,.5);
  transform:translateY(-2px);
  box-shadow:0 20px 40px -30px rgba(0,0,0,.95);
  text-decoration:none;
}
.card__index{
  display:block;margin-bottom:.5em;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;
  color:var(--ember);
}
.card__title{
  margin:0 0 .3em;
  font-family:var(--font-display);font-weight:900;
  font-size:1.22rem;line-height:1.25;letter-spacing:-.01em;
}
.card__meta{margin:0;color:var(--silver-dim);font-size:.9rem;line-height:1.65}
.card--arcade{border-color:rgba(139,92,246,.42)}
.card--arcade:hover,.card--arcade:focus-visible{border-color:var(--arcade-b)}
.card--table{border-color:rgba(201,162,77,.35)}
.card--table:hover,.card--table:focus-visible{border-color:var(--gold)}

/* ---------- 12. 横向分类轨道 ---------- */
.rail-track{
  display:flex;gap:14px;
  overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;
  padding:4px 2px 14px;
  scrollbar-width:thin;scrollbar-color:var(--track) transparent;
}
.rail-track > *{flex:0 0 clamp(220px,62%,320px);scroll-snap-align:start}
.rail-track::-webkit-scrollbar{height:6px}
.rail-track::-webkit-scrollbar-track{background:transparent}
.rail-track::-webkit-scrollbar-thumb{background:var(--track);border-radius:3px}

/* ---------- 13. 索引列表 ---------- */
.index-list{border-top:1px solid var(--track)}
.index-list__row{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  gap:12px;align-items:baseline;
  padding:12px 0;border-bottom:1px solid var(--track);
  font-size:.95rem;
}
.index-list__num{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--ember);
}
.index-list__label{color:var(--silver);min-width:0}
.index-list__meta{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;
  color:var(--silver-dim);white-space:nowrap;
}

/* ---------- 14. 时间线 ---------- */
.timeline{
  display:grid;gap:18px;
  padding-left:22px;border-left:1px solid var(--track);
}
.timeline__item{position:relative;padding-left:2px}
.timeline__item::before{
  content:"";position:absolute;left:-27px;top:.55em;
  width:9px;height:9px;border-radius:50%;
  background:var(--ink);border:2px solid var(--cyan);
}

/* ---------- 15. 面包屑 ---------- */
.breadcrumbs{
  padding-block:14px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--silver-dim);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--track)}
.breadcrumbs a{color:var(--silver-dim);text-decoration:none}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--silver)}

/* ---------- 16. 图像容器基础规则 ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  display:grid;
  min-height:120px;
  border:1px solid var(--track);border-radius:var(--radius-l);
  background:
    linear-gradient(150deg,rgba(61,224,232,.14),rgba(139,92,246,.18) 46%,rgba(226,69,61,.12));
}
.media-frame img,
.media-frame svg,
.media-frame video{
  display:block;width:100%;height:100%;
  object-fit:cover;border-radius:inherit;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--card{aspect-ratio:4/3}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--placeholder::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:repeating-linear-gradient(45deg,rgba(232,237,245,.06) 0 1px,transparent 1px 12px);
  pointer-events:none;
}
.media-frame--placeholder::after{
  content:"";position:absolute;inset:auto 12% 14% auto;width:64px;height:64px;z-index:0;
  border-radius:50%;
  background:radial-gradient(circle,rgba(61,224,232,.35),transparent 68%);
  pointer-events:none;
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:1;
  margin:0;padding:14px 16px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;
  color:var(--silver);
  background:linear-gradient(transparent,rgba(11,16,38,.88));
}

/* ---------- 17. 响应式 ---------- */
@media (min-width:760px){
  .col-4{grid-column:span 4}
  .col-5{grid-column:span 5}
  .col-6{grid-column:span 6}
  .col-7{grid-column:span 7}
  .col-8{grid-column:span 8}
  .col-12{grid-column:span 12}
  .footer-crest__inner{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr)) minmax(0,1.6fr)}
}

@media (min-width:980px){
  .layout-editorial{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
  .layout-editorial--flip{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
}

/* 平板与手机：抽屉式命令栏 */
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-rail{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    margin:0;
    padding:10px var(--gutter) 18px;
    background:var(--ink-2);
    border-bottom:1px solid var(--track);
    box-shadow:0 28px 48px -32px rgba(0,0,0,.98);
    max-height:min(70vh,520px);overflow-y:auto;
  }
  .site-header[data-open="true"] .nav-rail{display:block}
  .site-header[data-open="true"] .nav-toggle{
    border-color:rgba(61,224,232,.6);color:var(--cyan);
  }
  .site-header[data-open="true"] .nav-toggle__bars{background:transparent}
  .site-header[data-open="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
  .site-header[data-open="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
  .nav-rail__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-rail__item{width:100%}
  .rail-link{
    width:100%;justify-content:flex-start;
    padding:12px 12px;border-radius:12px;font-size:1rem;
  }
  .rail-link::after{display:none}
  .rail-link[aria-current="page"]{
    background:rgba(61,224,232,.12);
    box-shadow:inset 3px 0 0 var(--cyan);
    padding-left:15px;
  }
  .rail-link__idx{font-size:.66rem}
}

@media (max-width:760px){
  .commandbar__cta{display:none}
  .masthead__meta--end{display:none}
  .footer-base{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .brand-lockup__tag{display:none}
  .brand-lockup__mark{width:34px;height:34px;border-radius:11px;font-size:.84rem}
  .brand-lockup__name{font-size:1.05rem}
  .masthead__meta{font-size:.62rem;letter-spacing:.08em}
  .footer-contact__row{grid-template-columns:1fr;gap:2px}
}

/* ---------- 18. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .card:hover,.card:focus-visible,
  .btn:hover,
  .footer-link:hover,
  .brand-lockup:hover .brand-lockup__mark{transform:none}
}