/* ============================================================
   浩瀚体育安装 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ============================================================ */

:root{
  --ink-900:#050A16;
  --panel-blue:#0B1B33;
  --line:#1C3A61;
  --cyan:#2FE3F0;
  --cyan-deep:#0E7C93;
  --orange:#FF6A2B;
  --text:#EAF3FB;
  --text-2:#9DB4CE;
  --paper:#F4F7FB;
  --paper-ink:#0A1730;
  --green:#39D6A0;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;

  --grid:24px;
  --header-h:72px;
  --w-max:1240px;
  --pad-x:clamp(20px,5vw,64px);
  --radius:2px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink-900);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
/* 蓝图网格底纹 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(28,58,97,.30) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(28,58,97,.30) 1px,transparent 1px);
  background-size:var(--grid) var(--grid);
  opacity:.6;
}
main,.site-footer{position:relative;z-index:1;}
img{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.18;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--cyan);text-decoration:none;}
a:hover{color:var(--text);}
button{font-family:inherit;}
[hidden]{display:none !important;}

h1{font-size:clamp(36px,5.4vw,64px);}
h2{font-size:clamp(26px,3.4vw,40px);}
h3{font-size:clamp(20px,2.2vw,26px);}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}

.visually-hidden{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.mono{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em;}
.muted{color:var(--text-2);}
.text-cyan{color:var(--cyan);}
.text-orange{color:var(--orange);}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:12px 18px;
  background:var(--cyan);
  color:#04222a;
  font-weight:800;
  border-radius:var(--radius);
  transition:top .2s ease;
}
.skip-link:focus{top:12px;color:#04222a;}

/* ---------- 页头 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .35s ease,border-color .35s ease;
}
.site-header[data-scrolled="true"],
.site-header.is-solid{
  background:rgba(11,27,51,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
body.has-solid-header main{padding-top:var(--header-h);}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;
  height:2px;overflow:hidden;
}
.scroll-progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}

.header-inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:12px var(--pad-x);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,36px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  color:var(--text);
  flex:0 0 auto;
}
.brand:hover{color:var(--text);}
.brand-mark{
  position:relative;
  width:32px;height:32px;
  border:1px solid var(--cyan);
  background:linear-gradient(135deg,rgba(47,227,240,.22),transparent 68%);
}
.brand-mark::before{
  content:"";position:absolute;inset:6px;
  border:1px solid rgba(47,227,240,.45);
}
.brand-mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;
  width:9px;height:9px;background:var(--orange);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em;}
.brand-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--text-2);}

.site-nav{margin-left:auto;}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  counter-reset:navnum;
}
.nav-item{counter-increment:navnum;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 12px;
  font-size:14px;
  font-weight:700;
  color:var(--text-2);
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.nav-link::before{
  content:counter(navnum,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--line);
  transition:color .2s ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--text);}
.nav-link:hover::before{color:var(--text-2);}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.nav-link[aria-current="page"]::before{color:var(--cyan);}

.header-meta{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:8px;
  flex:0 0 auto;
}
.version-badge{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.03em;
  color:var(--text);
  background:rgba(47,227,240,.07);
  border:1px solid var(--line);
  border-radius:var(--radius);
  white-space:nowrap;
}
.badge-dot{
  width:7px;height:7px;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(57,214,160,.16);
  animation:pulse 2.4s ease-in-out infinite;
  flex:0 0 auto;
}
@keyframes pulse{
  0%,100%{opacity:1;}
  50%{opacity:.35;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  font-size:15px;
  font-weight:800;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--orange);border-color:var(--orange);color:#0A1730;}
.btn-primary:hover{background:#FF8149;border-color:#FF8149;color:#0A1730;transform:translateY(-1px);}
.btn-cyan{background:var(--cyan);border-color:var(--cyan);color:#04222a;}
.btn-cyan:hover{background:#5EEBF6;border-color:#5EEBF6;color:#04222a;}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn-sm{min-height:38px;padding:0 14px;font-size:13px;}
.btn-block{width:100%;}

/* ---------- 移动导航按钮 / 遮罩 / 抽屉 ---------- */
.nav-toggle{
  display:none;
  position:relative;
  z-index:90;
  align-items:center;
  gap:10px;
  min-height:44px;
  min-width:44px;
  padding:0 12px;
  background:rgba(11,27,51,.7);
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--text);
  font-size:13px;
  font-weight:800;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan);}
.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;background:var(--cyan);transition:transform .25s ease,opacity .25s ease;}
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(2){opacity:0;}
.site-header[data-open="true"] .nav-toggle-bars > span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.nav-scrim{display:none;}

.nav-foot{display:none;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(64px,8vw,120px);
  padding:clamp(48px,6vw,80px) 0 28px;
  background:linear-gradient(180deg,var(--ink-900) 0%,#081529 100%);
  border-top:1px solid var(--line);
}
.footer-grid-lines{
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(28,58,97,.28) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(28,58,97,.28) 1px,transparent 1px);
  background-size:var(--grid) var(--grid);
  opacity:.5;
}
.footer-inner{position:relative;z-index:1;}
.footer-top{
  display:grid;
  grid-template-columns:1.05fr 1.6fr 1.25fr;
  gap:clamp(24px,4vw,56px);
}
.footer-brand-name{
  font-size:22px;
  font-weight:800;
  letter-spacing:-.02em;
}
.footer-brand-line{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--cyan);
}
.footer-brand-note{
  margin-top:14px;
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}
.footer-brand-cta{margin-top:20px;}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.6vw,32px);
}
.footer-col-title{
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text);
  text-transform:uppercase;
}
.footer-links{margin-top:8px;}
.footer-links li + li{border-top:1px solid rgba(28,58,97,.5);}
.footer-links a{
  display:flex;
  align-items:center;
  min-height:44px;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s ease,padding-left .2s ease;
}
.footer-links a:hover{color:var(--cyan);padding-left:4px;}

.footer-contact{
  padding:20px;
  border:1px solid var(--line);
  background:rgba(11,27,51,.62);
  border-radius:var(--radius);
}
.footer-contact-title{
  padding-bottom:12px;
  margin-bottom:6px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan);
  text-transform:uppercase;
}
.contact-item{
  display:grid;
  gap:4px;
  padding:12px 0;
  border-bottom:1px solid rgba(28,58,97,.5);
}
.contact-item:last-child{border-bottom:0;padding-bottom:0;}
.contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:var(--text-2);
  text-transform:uppercase;
}
.contact-value{
  font-size:14px;
  line-height:1.7;
  color:var(--text);
  word-break:break-word;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:clamp(32px,4vw,56px);
  padding-top:20px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-2);
}
.footer-legal{letter-spacing:.06em;}
.footer-copy{letter-spacing:.02em;}

/* ---------- 通用布局 ---------- */
.container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:1 / -1;}
.section{padding-block:clamp(56px,7vw,104px);}
.section--tight{padding-block:clamp(32px,4vw,56px);}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(16px,3vw,40px);
  align-items:start;
  padding-top:24px;
  border-top:1px solid var(--line);
  margin-bottom:clamp(28px,4vw,52px);
}
.section-index{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4vw,46px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--cyan);
}
.section-title{font-size:clamp(24px,3.2vw,38px);}
.section-lede{
  margin-top:12px;
  max-width:62ch;
  font-size:16px;
  color:var(--text-2);
}
.eyebrow{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}

/* ---------- 面板 / 研究板 ---------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--line);
  background:rgba(11,27,51,.62);
  border-radius:var(--radius);
}
.panel-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding-bottom:14px;
  margin-bottom:18px;
  border-bottom:1px solid var(--line);
}
.panel-title{font-size:18px;font-weight:800;}
.panel-note{font-family:var(--font-mono);font-size:12px;color:var(--text-2);}
.panel-body{font-size:15px;line-height:1.8;color:var(--text);}

.brief{
  padding:22px 24px;
  border:1px solid var(--line);
  border-left:2px solid var(--cyan);
  background:rgba(11,27,51,.5);
  border-radius:var(--radius);
}
.brief-head{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
}
.brief-body{margin-top:10px;font-size:16px;line-height:1.8;}
.brief-foot{
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-2);
}

/* ---------- 数据 ---------- */
.stat{display:flex;flex-direction:column;gap:6px;}
.stat-value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(28px,4vw,44px);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.stat-label{font-size:13px;color:var(--text-2);}

.data-list{margin:0;border-top:1px solid var(--line);}
.data-list > div{
  display:grid;
  grid-template-columns:minmax(110px,190px) minmax(0,1fr);
  gap:16px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
}
.data-list dt{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text-2);
}
.data-list dd{margin:0;font-size:15px;line-height:1.75;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--text-2);
  border:1px solid var(--line);
  background:rgba(11,27,51,.6);
  border-radius:var(--radius);
}
.tag--cyan{border-color:rgba(47,227,240,.5);color:var(--cyan);}
.tag--orange{border-color:rgba(255,106,43,.55);color:var(--orange);}
.tag--green{border-color:rgba(57,214,160,.5);color:var(--green);}

/* ---------- 轮换数据面板 ---------- */
.rotator{position:relative;overflow:hidden;}
.rotator::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:0;
  background:linear-gradient(90deg,transparent 0%,rgba(47,227,240,.16) 55%,rgba(47,227,240,.6) 100%);
}
.rotator[data-scanning="true"]::after{animation:scan .6s linear;}
@keyframes scan{
  from{transform:translateX(100%);opacity:.85;}
  to{transform:translateX(-100%);opacity:0;}
}
.rotator [data-rotate-item]{display:none;}
.rotator [data-rotate-item].is-active{display:block;animation:rot-in .3s ease;}
@keyframes rot-in{from{opacity:0;}to{opacity:1;}}

/* ---------- 折叠面板 ---------- */
.accordion{border-top:1px solid var(--line);}
.acc-item{
  position:relative;
  border-bottom:1px solid var(--line);
}
.acc-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:2px;
  background:var(--cyan);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .25s ease;
}
.acc-item[data-open="true"]::before{transform:scaleY(1);}
.acc-trigger{
  display:flex;
  align-items:center;
  gap:16px;
  width:100%;
  min-height:64px;
  padding:16px 12px;
  background:none;
  border:0;
  color:var(--text);
  font-size:17px;
  font-weight:800;
  text-align:left;
  cursor:pointer;
}
.acc-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--text-2);
  flex:0 0 auto;
  transition:color .2s ease;
}
.acc-item[data-open="true"] .acc-num{color:var(--cyan);}
.acc-sign{
  position:relative;
  margin-left:auto;
  width:14px;height:14px;
  flex:0 0 auto;
}
.acc-sign::before,.acc-sign::after{
  content:"";
  position:absolute;
  background:var(--text-2);
  transition:transform .25s ease,background .25s ease;
}
.acc-sign::before{top:6px;left:0;width:14px;height:2px;}
.acc-sign::after{left:6px;top:0;width:2px;height:14px;}
.acc-item[data-open="true"] .acc-sign::after{transform:scaleY(0);background:var(--cyan);}
.acc-item[data-open="true"] .acc-sign::before{background:var(--cyan);}
.acc-panel{
  padding:0 12px 24px 42px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  animation:fade-in .2s ease;
}
@keyframes fade-in{from{opacity:0;}to{opacity:1;}}

/* ---------- 二选一切换 ---------- */
.switch{
  display:inline-flex;
  gap:3px;
  padding:3px;
  border:1px solid var(--line);
  background:rgba(11,27,51,.6);
  border-radius:var(--radius);
}
.switch-btn{
  min-height:40px;
  padding:0 18px;
  background:none;
  border:0;
  border-radius:var(--radius);
  color:var(--text-2);
  font-size:14px;
  font-weight:800;
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.switch-btn:hover{color:var(--text);}
.switch-btn[aria-selected="true"]{background:var(--cyan);color:#04222a;}

/* ---------- 日志卡片带 ---------- */
.track-strip{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:minmax(260px,1fr);
  gap:16px;
  overflow-x:auto;
  padding-bottom:14px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.track-card{
  scroll-snap-align:start;
  padding:20px;
  min-height:156px;
  border:1px solid var(--line);
  border-top:2px solid var(--cyan);
  background:rgba(11,27,51,.55);
  border-radius:var(--radius);
  transition:transform .2s ease,border-color .2s ease;
}
.track-card:hover{transform:translateY(-2px);border-color:var(--cyan);}

/* ---------- 文字与阅读 ---------- */
.prose{max-width:72ch;font-size:17px;line-height:1.85;}
.prose h2{margin-top:2em;font-size:clamp(22px,2.6vw,30px);}
.prose h3{margin-top:1.6em;font-size:20px;}
.prose p{margin-top:1em;}
.prose ul{margin-top:1em;padding-left:1.1em;list-style:square;}
.prose li{margin-top:.5em;}
.prose a{border-bottom:1px solid rgba(47,227,240,.5);}
.prose--paper{
  padding:clamp(24px,4vw,56px);
  background:var(--paper);
  color:var(--paper-ink);
  border:1px solid var(--line);
  border-radius:var(--radius);
  line-height:1.85;
}
.prose--paper h2,.prose--paper h3{color:var(--paper-ink);}
.prose--paper a{color:var(--cyan-deep);border-bottom-color:rgba(14,124,147,.5);}
.prose--paper a:hover{color:var(--paper-ink);}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-2);
}
.breadcrumbs li + li::before{content:"/";margin-right:8px;color:var(--line);}
.breadcrumbs a{color:var(--text-2);}
.breadcrumbs a:hover{color:var(--cyan);}
.breadcrumbs [aria-current="page"]{color:var(--cyan);}

.notice{
  padding:16px 20px;
  border:1px solid var(--line);
  border-left:2px solid var(--orange);
  background:rgba(255,106,43,.06);
  font-size:15px;
  line-height:1.8;
  border-radius:var(--radius);
}

/* ---------- 图片容器（供页面阶段使用） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  background:#08152A;
  border-radius:var(--radius);
  aspect-ratio:16 / 9;
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--text);
  background:linear-gradient(180deg,transparent,rgba(5,10,22,.85));
}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% 88%,88% 100%,0 100%);}
.media-frame--cut-left{clip-path:polygon(12% 0,100% 0,100% 100%,0 100%);}

/* ---------- 显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s ease,transform .6s ease;
}
[data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 章节索引高亮 ---------- */
[data-spy-target]{cursor:pointer;}
[data-spy-target].is-active{color:var(--cyan);}

/* ---------- 响应式 ---------- */
@media (min-width:1200px){
  .version-badge{display:inline-flex;}
}

@media (max-width:1080px){
  .nav-toggle{display:inline-flex;}
  .header-meta .btn{display:none;}
  .header-meta{margin-left:auto;}
  .site-nav{
    position:fixed;
    top:0;right:0;bottom:0;
    z-index:80;
    width:min(380px,88vw);
    height:100dvh;
    margin-left:0;
    padding:calc(var(--header-h) + 24px) 24px 32px;
    display:flex;
    flex-direction:column;
    background:var(--panel-blue);
    border-left:1px solid var(--line);
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .32s ease;
  }
  .site-header[data-open="true"] .site-nav{transform:translateX(0);}
  .site-header[data-open="true"] .nav-scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:70;
    padding:0;
    border:0;
    background:rgba(5,10,22,.72);
    cursor:pointer;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-item{border-bottom:1px solid var(--line);}
  .nav-link{
    width:100%;
    min-height:56px;
    padding:18px 0;
    justify-content:flex-start;
    font-size:19px;
    border-bottom:0;
  }
  .nav-link::before{font-size:12px;width:34px;}
  .nav-link[aria-current="page"]{border-bottom-color:transparent;padding-left:10px;}
  .nav-foot{
    display:block;
    margin-top:auto;
    padding-top:24px;
    border-top:1px solid var(--line);
  }
  .nav-foot-line{
    display:flex;
    align-items:center;
    gap:8px;
    margin-bottom:14px;
    font-family:var(--font-mono);
    font-size:12px;
    color:var(--text-2);
  }
  .footer-top{grid-template-columns:1fr 1fr;}
  .footer-contact{grid-column:1 / -1;}
}

@media (max-width:760px){
  :root{--header-h:64px;--grid:20px;}
  body{font-size:15.5px;}
  .brand-sub{display:none;}
  .footer-top{grid-template-columns:1fr;}
  .footer-cols{grid-template-columns:1fr;}
  .section-head{grid-template-columns:1fr;gap:12px;}
  .data-list > div{grid-template-columns:1fr;gap:6px;}
  .acc-panel{padding-left:12px;}
  .media-frame,.media-frame--tall{aspect-ratio:3 / 2;}
  .track-strip{grid-auto-columns:minmax(230px,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;
  }
  [data-reveal]{opacity:1;transform:none;}
  .rotator::after{display:none;}
  .track-card:hover{transform:none;}
}