/* ============================================================
   PG娱乐中心 · 夜间导航舱 Site Kit
   /assets/site.css —— reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

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

body,
h1,h2,h3,h4,h5,h6,
p,figure,blockquote,dl,dd{margin:0;}

ul,ol{margin:0;padding:0;list-style:none;}

a{color:inherit;text-decoration:none;}

button{
  font:inherit;
  color:inherit;
  background:none;
  border:0;
  padding:0;
  cursor:pointer;
}

img,svg,video{display:block;max-width:100%;height:auto;}

table{border-collapse:collapse;width:100%;}

main{display:block;}

/* ---------- 2. 设计变量 ---------- */
:root{
  --ink:#061523;
  --ink-2:#0B2033;
  --panel:#123049;
  --cyan:#35E0D2;
  --cyan-soft:rgba(53,224,210,.12);
  --violet:#7C5CFF;
  --gold:#F2B65A;
  --text:#EAF3F8;
  --muted:#9FB6C6;
  --line:#2A4761;
  --ok:#4FD08A;
  --warn:#E08A3C;

  --shell:1240px;
  --gutter:64px;
  --gap:24px;
  --radius:2px;
  --pill:999px;

  --font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Menlo","Consolas","Liberation Mono",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
}

@media (max-width:1024px){
  :root{--gutter:40px;}
}

@media (max-width:640px){
  :root{--gutter:20px;--gap:16px;}
}

/* ---------- 3. 基础排版与画布 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(42,71,97,.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42,71,97,.30) 1px, transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(120% 78% at 50% 0%, #000 0%, rgba(0,0,0,.35) 48%, transparent 84%);
  mask-image:radial-gradient(120% 78% at 50% 0%, #000 0%, rgba(0,0,0,.35) 48%, transparent 84%);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(820px 520px at 84% -10%, rgba(124,92,255,.24), transparent 66%),
    radial-gradient(640px 460px at 4% 96%, rgba(53,224,210,.13), transparent 72%),
    radial-gradient(520px 380px at 96% 62%, rgba(53,224,210,.07), transparent 70%);
}

::selection{background:rgba(53,224,210,.28);color:var(--text);}

@supports (scrollbar-color:auto){
  *{scrollbar-width:thin;scrollbar-color:var(--line) transparent;}
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--text);
}

.display{
  font-family:var(--font-display);
  font-size:clamp(40px,6.4vw,72px);
  font-weight:800;
  line-height:1.04;
  letter-spacing:-.02em;
  font-stretch:92%;
}

.chapter-title{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.9vw,34px);
  font-weight:600;
  line-height:1.28;
  letter-spacing:0;
}

.lede{
  max-width:36em;
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.7;
  color:var(--muted);
}

.mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
  color:var(--muted);
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
}

/* ---------- 4. 焦点可见 ---------- */
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:2px;
}

#main-content{scroll-margin-top:120px;}

/* ---------- 5. 布局原语 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.shell--narrow{max-width:920px;}

.band{
  position:relative;
  padding-block:clamp(52px,8vw,112px);
}

.band--alt{
  background:linear-gradient(180deg, rgba(11,32,51,.92) 0%, rgba(11,32,51,.55) 72%, rgba(11,32,51,0) 100%);
}

.band--hair{border-top:1px solid var(--line);}

.grid12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}

.col-3{grid-column:span 3;}
.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-9{grid-column:span 9;}
.col-12{grid-column:span 12;}

@media (max-width:1024px){
  .col-3,
  .col-4,
  .col-5{grid-column:span 6;}
  .col-7,
  .col-8,
  .col-9{grid-column:span 12;}
}

@media (max-width:640px){
  .col-3,.col-4,.col-5,
  .col-6,.col-7,.col-8,
  .col-9,.col-12{grid-column:span 12;}
}

/* ---------- 6. 章节头 ---------- */
.chapter-head{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:clamp(22px,3vw,34px);
}

.chapter-no{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  font-variant-numeric:tabular-nums;
  color:var(--cyan);
}

.chapter-rule{
  display:block;
  flex:none;
  width:26px;
  height:1px;
  background:var(--cyan);
}

/* ---------- 7. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:13px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(18,48,73,.55);
  color:var(--text);
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}

.btn:hover{transform:translateY(-1px);}

.btn--primary{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04121d;
}

.btn--primary:hover{
  background:#5aeee2;
  border-color:#5aeee2;
}

.btn--violet{
  background:var(--violet);
  border-color:var(--violet);
  color:#ffffff;
}

.btn--violet:hover{
  background:#8f75ff;
  border-color:#8f75ff;
}

.btn--gold{
  background:var(--gold);
  border-color:var(--gold);
  color:#1d1204;
}

.btn--gold:hover{
  background:#f7c880;
  border-color:#f7c880;
}

.btn--ghost{background:transparent;}

.btn--ghost:hover{
  background:var(--cyan-soft);
  border-color:var(--cyan);
  color:var(--cyan);
}

.link-more{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding-block:6px;
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease);
}

.link-more::after{
  content:"→";
  transition:transform .22s var(--ease);
}

.link-more:hover{border-bottom-color:rgba(53,224,210,.5);}
.link-more:hover::after{transform:translateX(4px);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:rgba(18,48,73,.5);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  font-variant-numeric:tabular-nums;
}

.tag--cyan{
  color:var(--cyan);
  border-color:rgba(53,224,210,.45);
  background:rgba(53,224,210,.08);
}

.tag--gold{
  color:var(--gold);
  border-color:rgba(242,182,90,.45);
  background:rgba(242,182,90,.08);
}

/* ---------- 8. 面包屑 ---------- */
.crumbs{
  padding-block:20px;
  border-bottom:1px solid var(--line);
}

.crumbs-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}

.crumbs-item{
  display:inline-flex;
  align-items:center;
  gap:10px;
}

.crumbs-item + .crumbs-item::before{
  content:"/";
  color:rgba(42,71,97,.95);
}

.crumb-link{color:var(--muted);transition:color .2s var(--ease);}
.crumb-link:hover{color:var(--cyan);}

.crumbs-item [aria-current="page"]{color:var(--text);}

/* ---------- 9. 正文排版 ---------- */
.prose{
  max-width:38em;
  font-size:17px;
  line-height:1.8;
  color:var(--text);
}

.prose > * + *{margin-top:1.2em;}

.prose h2{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.6vw,28px);
  font-weight:600;
  line-height:1.3;
  margin-top:2.4em;
}

.prose h3{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  margin-top:2em;
}

.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(53,224,210,.4);
}

.prose a:hover{border-bottom-color:var(--cyan);}

.prose ul,
.prose ol{display:grid;gap:.6em;}

.prose li{
  position:relative;
  padding-left:1.15em;
}

.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.84em;
  width:9px;
  height:1px;
  background:rgba(53,224,210,.85);
}

.prose strong{font-weight:700;color:var(--text);}

/* ---------- 10. 图片容器 ---------- */
.figure{
  display:block;
  margin:0;
}

.figure-media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  aspect-ratio:16 / 9;
  background:linear-gradient(150deg,#0B2033 0%,#123049 52%,#0B2033 100%);
}

.figure-media img,
.figure-media picture,
.figure-media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.figure-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(90deg, rgba(42,71,97,.22) 0 1px, transparent 1px 56px),
    linear-gradient(180deg, transparent 62%, rgba(6,21,35,.45) 100%);
}

.figure-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

.figure--wide .figure-media{aspect-ratio:21 / 9;}
.figure--tall .figure-media{aspect-ratio:4 / 5;}
.figure--square .figure-media{aspect-ratio:1 / 1;}

/* ---------- 11. 头部：悬浮胶囊浮岛 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:200;
  padding:12px 18px;
  border-radius:var(--radius);
  background:var(--cyan);
  color:#04121d;
  font-weight:700;
  font-size:14px;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}

.skip-link:focus{transform:translateY(0);}

.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:14px var(--gutter) 0;
}

.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg, rgba(6,21,35,.96) 0%, rgba(6,21,35,.72) 58%, rgba(6,21,35,0) 100%);
}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:16px;
  max-width:var(--shell);
  min-height:64px;
  margin-inline:auto;
  padding:0 12px 0 18px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:linear-gradient(180deg, rgba(11,32,51,.94) 0%, rgba(6,21,35,.88) 100%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
  box-shadow:0 22px 54px -34px rgba(0,0,0,.95), inset 0 1px 0 rgba(234,243,248,.06);
  transition:min-height .28s var(--ease),border-color .28s var(--ease),background .28s var(--ease);
}

.header-shell[data-condensed]{
  min-height:52px;
  border-color:rgba(53,224,210,.28);
  background:linear-gradient(180deg, rgba(11,32,51,.98) 0%, rgba(6,21,35,.94) 100%);
}

.brand-island{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:none;
  padding-right:16px;
  border-right:1px solid var(--line);
}

.brand-dial{
  position:relative;
  display:grid;
  place-items:center;
  width:30px;
  height:30px;
  flex:none;
  border-radius:50%;
  border:1px solid var(--line);
}

.brand-dial::before{
  content:"";
  position:absolute;
  inset:4px;
  border-radius:50%;
  border:1px solid rgba(53,224,210,.28);
  border-top-color:var(--cyan);
  border-right-color:var(--violet);
}

.brand-dial-dot{
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,224,210,.9);
}

.brand-text{
  display:block;
  min-width:0;
  line-height:1.15;
}

.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:16px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--text);
  white-space:nowrap;
  transition:color .2s var(--ease);
}

.brand-meta{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--muted);
  white-space:nowrap;
}

.brand-island:hover .brand-name{color:var(--cyan);}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:8px 13px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:rgba(18,48,73,.6);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}

.nav-toggle:hover{
  color:var(--cyan);
  border-color:rgba(53,224,210,.4);
}

.nav-toggle-bars{
  display:grid;
  gap:3px;
  width:14px;
}

.nav-toggle-bars span{
  display:block;
  width:14px;
  height:1.5px;
  border-radius:1px;
  background:currentColor;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}

.nav-toggle[aria-expanded="true"]{
  color:var(--cyan);
  border-color:rgba(53,224,210,.5);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(4.5px) 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(-4.5px) rotate(-45deg);}

.site-nav{margin-left:auto;min-width:0;}

.site-nav[data-nav]{display:block;}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}

.nav-item{display:block;}

.nav-link{
  display:block;
  padding:9px 14px;
  border-radius:var(--pill);
  color:var(--muted);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}

.nav-link:hover{
  color:var(--text);
  background:rgba(53,224,210,.1);
}

.nav-link[aria-current="page"]{
  background:var(--cyan);
  color:#04121d;
}

.nav-link[aria-current="page"]:hover{
  background:#5aeee2;
  color:#04121d;
}

.header-ticker{
  display:inline-flex;
  align-items:center;
  gap:7px;
  flex:none;
  margin-left:8px;
  padding:7px 13px;
  border:1px solid rgba(242,182,90,.32);
  border-radius:var(--pill);
  background:rgba(242,182,90,.08);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  white-space:nowrap;
}

.ticker-dot{
  width:5px;
  height:5px;
  flex:none;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 8px rgba(242,182,90,.9);
}

.ticker-text{display:block;}

/* ---------- 12. 滚动刻度与返回顶部刻度环 ---------- */
.scroll-ruler{
  position:fixed;
  right:20px;
  top:140px;
  bottom:140px;
  width:2px;
  border-radius:2px;
  background:rgba(42,71,97,.5);
  z-index:60;
  pointer-events:none;
}

.scroll-ruler-fill{
  display:block;
  width:100%;
  height:100%;
  border-radius:inherit;
  transform-origin:top center;
  transform:scaleY(0);
  background:linear-gradient(180deg,var(--cyan) 0%,var(--violet) 88%);
  box-shadow:0 0 12px rgba(53,224,210,.55);
}

.dock-dial{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:70;
  display:grid;
  place-items:center;
  width:54px;
  height:54px;
  border:1px solid var(--line);
  border-radius:50%;
  background:rgba(11,32,51,.95);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}

.dock-dial::before{
  content:"";
  position:absolute;
  inset:-5px;
  border-radius:50%;
  background:conic-gradient(
    from -90deg,
    var(--cyan) 0deg,
    var(--violet) var(--dock-arc,0deg),
    rgba(42,71,97,.55) var(--dock-arc,0deg) 360deg
  );
  -webkit-mask:radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
  mask:radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 3px));
}

.dock-dial[data-visible]{
  opacity:1;
  visibility:visible;
  transform:none;
}

.dock-dial:hover{
  color:var(--cyan);
  border-color:rgba(53,224,210,.5);
}

.dock-dial-core{display:block;line-height:1;}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,7vw,96px);
  padding-block:clamp(40px,6vw,72px) 26px;
  background:var(--ink-2);
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg, transparent 0%, rgba(53,224,210,.65) 30%, rgba(124,92,255,.65) 70%, transparent 100%);
}

.footer-shell{position:relative;}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.2fr;
  gap:44px 56px;
}

.footer-brand{
  display:grid;
  justify-items:start;
  align-content:start;
  gap:16px;
}

.brand-island--footer{
  border-right:0;
  padding-right:0;
}

.footer-slogan{
  max-width:24em;
  font-size:15px;
  line-height:1.75;
  color:var(--muted);
}

.footer-stamp{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 14px;
  border:1px solid rgba(42,71,97,.9);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}

.stamp-key{color:var(--muted);}
.stamp-value{color:var(--cyan);}

.footer-nav{
  display:grid;
  align-content:start;
  gap:14px;
}

.footer-heading{
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  font-weight:400;
}

.footer-heading::after{
  content:"";
  flex:1;
  height:1px;
  background:linear-gradient(90deg, rgba(42,71,97,.9), transparent);
}

.footer-heading--sub{margin-top:10px;}

.footer-links{
  display:grid;
  gap:2px;
}

.footer-link{
  display:inline-block;
  padding:5px 0;
  color:var(--text);
  font-size:15px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}

.footer-link:hover{
  color:var(--cyan);
  transform:translateX(3px);
}

.footer-contact{
  display:grid;
  align-content:start;
  gap:14px;
}

.contact-list{display:grid;}

.contact-row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:14px;
  padding:9px 0;
  border-bottom:1px solid rgba(42,71,97,.6);
  font-size:14px;
}

.contact-label{
  padding-top:2px;
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}

.contact-value{
  color:var(--text);
  word-break:break-word;
}

.footer-note{
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.04em;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(32px,5vw,52px);
  padding-top:18px;
  border-top:1px solid var(--line);
}

.footer-legal-text{
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  font-variant-numeric:tabular-nums;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1280px){
  .scroll-ruler{display:none;}
}

@media (max-width:980px){
  .site-header{padding:10px var(--gutter) 0;}

  .header-shell{
    flex-wrap:wrap;
    gap:10px 12px;
    min-height:0;
    padding:10px 12px 12px;
    border-radius:20px;
  }

  .header-shell[data-condensed]{min-height:0;border-radius:20px;}

  .brand-island{
    flex:1 1 auto;
    padding-right:0;
    border-right:0;
  }

  .brand-meta{display:none;}

  .nav-toggle{display:inline-flex;}

  .header-ticker{
    order:3;
    margin-left:0;
    padding:5px 10px;
    font-size:10px;
  }

  .site-nav{order:4;flex:1 1 100%;margin-left:0;}

  .site-nav[data-nav]{display:none;}

  .site-nav[data-nav][data-open]{display:block;}

  .nav-list{
    overflow-x:auto;
    gap:6px;
    margin-top:2px;
    padding-top:10px;
    border-top:1px solid var(--line);
  }

  .nav-link{
    padding:8px 14px;
    background:rgba(18,48,73,.7);
    font-size:13px;
  }

  .nav-link[aria-current="page"]{background:var(--cyan);}

  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 40px;}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:640px){
  .site-header{padding:8px var(--gutter) 0;}

  .brand-name{font-size:15px;}

  .header-ticker{display:none;}

  .dock-dial{
    right:14px;
    bottom:14px;
    width:48px;
    height:48px;
    font-size:10px;
  }

  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-legal{flex-direction:column;}
}

/* ---------- 15. 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }

  .btn:hover,
  .footer-link:hover{transform:none;}

  .link-more:hover::after{transform:none;}

  .dock-dial{transition:none;}
}