/* ============================================================
   九游体育主站 · 共享样式表  /assets/site.css
   夜场电子计分牌：深墨蓝底 + 荧光青轨迹 + 橙红尖峰
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-950:#050B1A;
  --navy-800:#0B1730;
  --navy-700:#12224A;
  --cyan-400:#35F2D6;
  --cyan-700:#0E8F82;
  --ember-500:#FF5A2B;
  --paper-100:#F3EDE2;
  --paper-300:#D8CFBE;
  --slate-400:#9FB2CC;
  --white:#FFFFFF;

  --text:#E7EEFA;
  --text-dim:var(--slate-400);
  --hairline:rgba(53,242,214,.22);
  --hairline-soft:rgba(159,178,204,.18);
  --edge:rgba(159,178,204,.16);

  --font-display:"Archivo Narrow","Roboto Condensed","Helvetica Neue",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
  --font-serif:Georgia,"Songti SC","SimSun",serif;

  --wrap:1280px;
  --gutter:clamp(1rem,4vw,3rem);
  --cut:12px;
  --cut-lg:26px;
  --t:240ms cubic-bezier(.2,.7,.3,1);
  --t-fast:120ms cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
[hidden]{display:none!important}

:where(a,button,[tabindex],input,select,summary):focus-visible{
  outline:2px solid var(--cyan-400);
  outline-offset:3px;
  transform:translateY(-1px);
  transition:transform var(--t-fast),outline-color var(--t-fast);
}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--ink-950);
  color:var(--text);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    repeating-linear-gradient(90deg,rgba(159,178,204,.055) 0 1px,transparent 1px 92px),
    repeating-linear-gradient(0deg,rgba(159,178,204,.04) 0 1px,transparent 1px 92px);
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.14;
  color:var(--white);
  text-wrap:balance;
}
h1{font-size:clamp(2.1rem,6vw,4.4rem)}
h2{font-size:clamp(1.5rem,3.4vw,2.4rem)}
h3{font-size:clamp(1.15rem,2.2vw,1.5rem)}
p{text-wrap:pretty}
strong{color:var(--white);font-weight:700}
.mono{font-family:var(--font-mono);letter-spacing:.08em}
.muted{color:var(--text-dim)}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;
  padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.skip-link{
  position:fixed;
  top:-120px;
  left:50%;
  transform:translateX(-50%);
  z-index:200;
  padding:12px 22px;
  background:var(--cyan-400);
  color:var(--ink-950);
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.14em;
  transition:top 160ms ease;
}
.skip-link:focus{top:10px;transform:translateX(-50%)}

/* ---------- 4. 布局容器 ---------- */
.container{
  width:100%;
  max-width:calc(var(--wrap) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
  position:relative;
  z-index:1;
}
.section{padding-block:clamp(2.5rem,6vw,5rem);position:relative;z-index:1}
.section--tight{padding-block:clamp(1.5rem,3.5vw,2.75rem)}
.zone--navy{background:linear-gradient(180deg,var(--navy-800),#081226)}
.zone--paper{background:var(--paper-100);color:#182130}
.zone--paper h1,.zone--paper h2,.zone--paper h3{color:#0B1730;font-family:var(--font-serif);letter-spacing:0}
.zone--paper .eyebrow,.zone--paper .muted{color:#4A586E}
.zone--paper a:hover{color:var(--cyan-700)}

.divider{height:1px;border:0;background:var(--hairline-soft)}

.section-head{margin-bottom:clamp(1.25rem,3vw,2rem);max-width:70ch}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan-400)}
.section-head__title{margin-top:.6rem}
.section-head__note{margin-top:.75rem;color:var(--text-dim);font-size:.98rem;max-width:62ch}

/* ---------- 5. 网格 ---------- */
.grid{display:grid;gap:clamp(1rem,2.4vw,1.75rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1fr) minmax(0,2.4fr)}
.grid--stagger > *:nth-child(even){transform:translateY(clamp(0px,1.6vw,22px))}

/* ---------- 6. 切角与面板 ---------- */
.cut-a{clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut))}
.cut-b{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}

.panel{
  position:relative;
  background:var(--navy-700);
  box-shadow:inset 0 0 0 1px var(--edge);
  padding:clamp(1rem,2.2vw,1.6rem);
}
.panel--cut-a{clip-path:polygon(var(--cut-lg) 0,100% 0,100% calc(100% - var(--cut-lg)),calc(100% - var(--cut-lg)) 100%,0 100%,0 var(--cut-lg))}
.panel--cut-b{clip-path:polygon(0 0,calc(100% - var(--cut-lg)) 0,100% var(--cut-lg),100% 100%,var(--cut-lg) 100%,0 calc(100% - var(--cut-lg)))}
.panel--offset{box-shadow:inset 0 0 0 1px var(--edge),12px 12px 0 rgba(14,143,130,.22)}
.panel--ghost{background:transparent;box-shadow:inset 0 0 0 1px var(--hairline-soft)}
.panel--slim{padding:clamp(.75rem,1.6vw,1.1rem)}

.metric{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(2rem,6vw,3.6rem);
  line-height:.95;
  letter-spacing:-.03em;
  color:var(--white);
}
.metric--cyan{color:var(--cyan-400)}
.metric--ember{color:var(--ember-500)}
.metric--sm{font-size:clamp(1.4rem,3vw,2rem)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.45em;
  padding:.36em .7em;
  font-family:var(--font-mono);
  font-size:.64rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan-400);
  box-shadow:inset 0 0 0 1px var(--hairline);
}
.tag--ember{color:var(--ember-500);box-shadow:inset 0 0 0 1px rgba(255,90,43,.42)}
.tag--paper{color:#1F2A3D;box-shadow:inset 0 0 0 1px rgba(31,42,61,.3)}

/* ---------- 7. 按钮与筛选 chip ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6em;
  padding:.9em 1.45em;
  font-family:var(--font-mono);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text);
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t-fast);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--cyan-400);color:var(--ink-950)}
.btn--primary:hover{background:#66F7E2}
.btn--outline{color:var(--cyan-400);box-shadow:inset 0 0 0 1px rgba(53,242,214,.42)}
.btn--outline:hover{background:rgba(53,242,214,.1);box-shadow:inset 0 0 0 1px var(--cyan-400)}
.btn--ember{background:var(--ember-500);color:#fff}
.btn--ember:hover{background:#FF7048}

.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.6em 1em;
  font-family:var(--font-mono);
  font-size:.74rem;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--text-dim);
  box-shadow:inset 0 0 0 1px var(--hairline-soft);
  clip-path:polygon(7px 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%,0 7px);
  transition:color var(--t-fast),background var(--t-fast),box-shadow var(--t-fast);
}
.chip:hover{color:var(--cyan-400);box-shadow:inset 0 0 0 1px var(--hairline)}
.chip[aria-pressed="true"]{background:var(--cyan-400);color:var(--ink-950);box-shadow:none}
.zone--paper .chip{color:#3D4A60;box-shadow:inset 0 0 0 1px rgba(31,42,61,.28)}
.zone--paper .chip[aria-pressed="true"]{background:#0B1730;color:var(--paper-100);box-shadow:none}

/* ---------- 8. 索引 / 图例 ---------- */
.legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  padding-top:14px;
  border-top:1px solid var(--hairline-soft);
}
.legend__item{
  display:flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.legend__item::before{content:"";width:18px;height:1px;background:var(--cyan-400);flex:none}
.legend__item--ember::before{background:var(--ember-500)}
.zone--paper .legend{border-top-color:rgba(31,42,61,.2)}
.zone--paper .legend__item{color:#4A586E}

/* ---------- 9. 面包屑与正文 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  padding-block:18px 4px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--text-dim);
}
.breadcrumbs li{display:flex;align-items:center;gap:6px}
.breadcrumbs li::after{content:"/";color:var(--cyan-700)}
.breadcrumbs li:last-child::after{content:""}
.breadcrumbs a:hover{color:var(--cyan-400)}

.prose{max-width:68ch;font-size:1.0625rem;line-height:1.8}
.prose > * + *{margin-top:1em}
.prose h2{margin-top:2.1em;font-size:clamp(1.4rem,2.6vw,1.95rem)}
.prose h3{margin-top:1.7em}
.prose ul li{position:relative;padding-left:1.3em}
.prose ul li + li{margin-top:.5em}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:10px;height:1px;background:var(--cyan-400)}
.prose a{color:var(--cyan-400);border-bottom:1px solid var(--hairline)}
.prose a:hover{border-bottom-color:var(--cyan-400)}
.prose--paper{background:var(--paper-100);color:#1D2739;padding:clamp(1.25rem,3vw,2.25rem)}
.prose--paper h2,.prose--paper h3{color:#0B1730;font-family:var(--font-serif)}
.prose--paper a{color:var(--cyan-700);border-bottom-color:rgba(14,143,130,.4)}
.prose--paper ul li::before{background:var(--cyan-700)}

/* ---------- 10. 图片容器基础 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(160deg,var(--navy-700),#060D1E);
  box-shadow:inset 0 0 0 1px var(--edge);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--cut{clip-path:polygon(0 0,calc(100% - var(--cut-lg)) 0,100% var(--cut-lg),100% 100%,var(--cut-lg) 100%,0 calc(100% - var(--cut-lg)))}
.media-frame > img,
.media-frame > video{width:100%;height:100%;object-fit:cover;filter:saturate(1.06) contrast(1.06)}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(5,11,26,0) 42%,rgba(5,11,26,.74));
}
.media-frame__ph{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:rgba(159,178,204,.5);
  text-align:center;
  padding:1rem;
}
.media-frame__cap{
  position:absolute;
  left:16px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--cyan-400);
}

/* ---------- 11. 显现动效 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 480ms ease,transform 480ms cubic-bezier(.2,.7,.3,1);
}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 12. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(5,11,26,.985),rgba(5,11,26,.93));
  border-bottom:1px solid var(--hairline-soft);
  backdrop-filter:blur(8px);
}
.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(159,178,204,.12);
}
.header-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan-700),var(--cyan-400));
  transition:transform 140ms linear;
}
.header-inner{padding-top:clamp(.7rem,1.8vw,1.1rem)}

.masthead{
  display:grid;
  justify-items:center;
  text-align:center;
  gap:6px;
  padding-block:clamp(.5rem,1.6vw,1rem) clamp(.6rem,1.6vw,1rem);
}
.masthead__kicker{
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:700;
  letter-spacing:.36em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.masthead__brand{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,4.2vw,2.5rem);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.05;
  color:var(--white);
  transition:color var(--t),letter-spacing var(--t);
}
.masthead__brand:hover{color:var(--cyan-400);letter-spacing:.01em}
.masthead__line{
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--text-dim);
}

.header-bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"toggle nav actions";
  align-items:center;
  gap:14px;
  border-top:1px solid var(--hairline-soft);
  padding-block:9px 11px;
}
.site-nav{grid-area:nav;justify-self:center;min-width:0}
.header-actions{grid-area:actions;justify-self:end;display:flex;align-items:center;gap:14px}

.nav-list{
  display:flex;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
  gap:clamp(.4rem,1.6vw,1.5rem);
}
.nav-list a{
  position:relative;
  display:inline-flex;
  flex-direction:column;
  gap:3px;
  padding:5px 2px 7px;
  font-size:.95rem;
  font-weight:600;
  color:var(--text);
  transition:color var(--t);
}
.nav-list__idx{
  font-family:var(--font-mono);
  font-size:.56rem;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan-700);
  transition:color var(--t);
}
.nav-list__label{line-height:1.15}
.nav-list a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t);
}
.nav-list a:hover{color:var(--cyan-400)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--cyan-400)}
.nav-list a[aria-current="page"]::after{transform:scaleX(1)}
.nav-list a[aria-current="page"] .nav-list__idx{color:var(--ember-500)}

.action-link{
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--text-dim);
  padding:7px 9px;
  box-shadow:inset 0 0 0 1px transparent;
  transition:color var(--t-fast),box-shadow var(--t-fast);
}
.action-link:hover{color:var(--cyan-400);box-shadow:inset 0 0 0 1px var(--hairline)}

.nav-toggle{
  grid-area:toggle;
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  color:var(--cyan-400);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.16em;
  box-shadow:inset 0 0 0 1px var(--hairline);
}
.nav-toggle__bars{position:relative;display:block;width:18px;height:10px;flex:none}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform var(--t);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}

/* 收窄态：滚动过首屏后刊头压成一行 */
.site-header[data-condensed] .masthead{
  grid-auto-flow:column;
  grid-template-columns:auto auto;
  justify-content:center;
  align-items:baseline;
  gap:14px;
  padding-block:clamp(.3rem,.9vw,.5rem);
}
.site-header[data-condensed] .masthead__kicker{display:none}
.site-header[data-condensed] .masthead__brand{font-size:clamp(1.05rem,2vw,1.3rem)}
.site-header[data-condensed] .masthead__line{text-align:left}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--navy-800);
  border-top:1px solid var(--hairline-soft);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(135deg,rgba(53,242,214,.055) 0 1px,transparent 1px 24px);
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(230px,1.15fr) repeat(3,minmax(140px,.85fr));
  gap:clamp(1.5rem,4vw,3rem);
  padding-block:clamp(2.25rem,5.5vw,3.75rem) clamp(1.5rem,3.5vw,2.25rem);
}
.footer-brand__name{
  display:inline-block;
  font-family:var(--font-display);
  font-size:1.4rem;
  font-weight:800;
  color:var(--white);
  transition:color var(--t);
}
.footer-brand__name:hover{color:var(--cyan-400)}
.footer-brand__line{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--cyan-400);
}
.footer-brand__note{
  margin-top:.85rem;
  max-width:34ch;
  font-size:.94rem;
  line-height:1.75;
  color:var(--text-dim);
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--white);
  padding-bottom:10px;
  margin-bottom:12px;
  border-bottom:1px solid var(--hairline);
}
.footer-col li + li{margin-top:2px}
.footer-col a{
  display:inline-block;
  padding:6px 0;
  font-size:.94rem;
  color:var(--text-dim);
  transition:color var(--t-fast),padding-left var(--t-fast);
}
.footer-col a:hover{color:var(--cyan-400);padding-left:8px}

.footer-service{
  position:relative;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:14px;
  padding-block:clamp(1.25rem,3vw,1.75rem);
  border-top:1px solid var(--hairline-soft);
}
.footer-service__item{
  background:var(--navy-700);
  box-shadow:inset 0 0 0 1px var(--edge);
  padding:15px 17px;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.footer-service__item--note{background:transparent;box-shadow:inset 0 0 0 1px var(--hairline)}
.footer-service__label{
  font-family:var(--font-mono);
  font-size:.64rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.footer-service__value{
  margin-top:8px;
  font-size:.94rem;
  line-height:1.65;
  color:var(--text);
  word-break:break-word;
}
.footer-service__value--mono{font-family:var(--font-mono);letter-spacing:.02em}

.footer-legal{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
  align-items:center;
  justify-content:space-between;
  padding-block:18px clamp(20px,3vw,30px);
  border-top:1px solid var(--hairline-soft);
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--text-dim);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
}

@media (max-width:920px){
  .header-bar{
    grid-template-columns:auto 1fr;
    grid-template-areas:"toggle actions" "nav nav";
    align-items:center;
  }
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    width:100%;
    justify-self:stretch;
    background:var(--navy-800);
    box-shadow:inset 0 0 0 1px var(--hairline-soft);
    padding:10px 12px 14px;
    margin-bottom:12px;
    clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  }
  .site-nav[data-open]{display:block;animation:nav-in 180ms cubic-bezier(.2,.7,.3,1) both}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list a{
    flex-direction:row;
    align-items:center;
    gap:14px;
    padding:13px 6px;
    border-bottom:1px dashed rgba(159,178,204,.2);
  }
  .nav-list li:last-child a{border-bottom:0}
  .nav-list a::after{display:none}
  .nav-list__idx{font-size:.62rem;min-width:24px}
  .nav-list a[aria-current="page"]{box-shadow:inset 3px 0 0 var(--cyan-400);padding-left:14px}

  .site-header[data-condensed] .masthead{
    grid-auto-flow:row;
    grid-template-columns:1fr;
    gap:4px;
  }
  .site-header[data-condensed] .masthead__line{text-align:center;font-size:.62rem}

  .grid--split,.grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .grid--stagger > *:nth-child(even){transform:none}
  .footer-legal{justify-content:flex-start}
}

@media (max-width:620px){
  .action-link{display:none}
  .header-cta{padding:.72em 1em;font-size:.7rem;letter-spacing:.1em}
  .masthead__line{letter-spacing:.12em}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-service{grid-template-columns:minmax(0,1fr)}
  .footer-legal{font-size:.72rem}
}

@keyframes nav-in{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

/* ---------- 15. 降低动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .nav-list a:hover,.btn:hover,:where(a,button,[tabindex]):focus-visible{transform:none}
}