/* =========================================================
   博电竞iOS版 · 共享样式表 /assets/site.css
   夜间电竞控制室：深空黑底 / 控制台面板 / 荧光紫与冰蓝数据高亮
   ========================================================= */

:root{
  --ink:#06070B;
  --panel:#0D1017;
  --raise:#151A24;
  --line:#262D3B;
  --line-strong:#39435A;
  --line-soft:#1B212C;
  --muted:#8E96AA;
  --muted-dim:#5F6879;
  --text:#E8EBF4;
  --body-text:#C7CEDE;
  --violet:#A45CFF;
  --violet-lift:#B879FF;
  --ice:#4FD7FF;
  --coral:#FF7A4A;
  --teal:#2ED9A4;
  --red:#FF5470;
  --shadow-card:0 1px 0 rgba(255,255,255,.03),0 16px 34px -26px rgba(0,0,0,.95);
  --shadow-card-hover:0 1px 0 rgba(255,255,255,.04),0 22px 44px -30px rgba(164,92,255,.6);
  --font-display:"Arial Narrow","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --maxw:1320px;
  --gutter:24px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* 全站辉光底纹（不参与交互，位于所有内容之下） */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(900px 560px at 10% -10%, rgba(164,92,255,.13), transparent 60%),
    radial-gradient(820px 520px at 94% 2%, rgba(79,215,255,.09), transparent 62%),
    radial-gradient(700px 500px at 50% 108%, rgba(79,215,255,.05), transparent 60%);
}

/* ---------- 02 焦点与可访问性 ---------- */
:focus{outline:none}
:focus-visible{
  outline:2px solid var(--violet);
  outline-offset:2px;
  border-radius:2px;
}
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:10px 16px;
  border-radius:3px;
  background:var(--violet);
  color:#0A0410;
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 03 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
  position:relative;
  z-index:1;
}
.container--narrow{max-width:940px}
.section{padding:72px 0}
.section--tight{padding:44px 0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 04 页头：双层命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,7,11,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(6,7,11,.985);
  border-bottom-color:var(--line-strong);
  box-shadow:0 18px 36px -30px rgba(0,0,0,1);
}
.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}
.header-top{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:66px;
  padding:8px 0;
  transition:min-height .2s var(--ease),padding .2s var(--ease);
}
.site-header[data-scrolled="true"] .header-top{min-height:56px;padding:4px 0}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  flex:none;
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  border:1px solid var(--line-strong);
  border-radius:4px;
  background:linear-gradient(140deg, rgba(164,92,255,.28), rgba(79,215,255,.10));
  box-shadow:inset 0 0 12px rgba(164,92,255,.18);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--text);
}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0;line-height:1.25}
.brand-line{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:800;
  letter-spacing:.005em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  border:1px solid var(--line);
  border-radius:3px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--violet);color:var(--text)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:10px;flex:none}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(4.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-4.25px) rotate(-45deg)}
.nav-toggle-text{white-space:nowrap}

.header-rail{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:46px;
  padding:5px 0;
  border-top:1px solid var(--line);
}
.rail-label{
  flex:none;
  padding-right:14px;
  border-right:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--muted-dim);
  white-space:nowrap;
}
.site-nav{flex:1;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-item{min-width:0}
.nav-link{
  display:flex;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border:1px solid transparent;
  border-radius:3px;
  font-size:13.5px;
  line-height:1.4;
  color:var(--muted);
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-link:hover{color:var(--text);border-color:var(--line);background:var(--panel)}
.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--violet);
}
.nav-label{white-space:nowrap}
.nav-link[aria-current="page"]{
  color:var(--text);
  border-color:rgba(164,92,255,.55);
  background:rgba(164,92,255,.11);
}
.nav-link[aria-current="page"] .nav-index{color:var(--ice)}

.rail-meta{
  flex:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding-left:14px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
}
.state-dot{
  flex:none;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(46,217,164,.16);
  animation:dotPulse 2.6s ease-in-out infinite;
}
.state-dot--coral{background:var(--coral);box-shadow:0 0 0 3px rgba(255,122,74,.16)}
.state-dot--violet{background:var(--violet);box-shadow:0 0 0 3px rgba(164,92,255,.18)}
@keyframes dotPulse{0%,100%{opacity:1}50%{opacity:.42}}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  z-index:2;
  display:block;
  height:2px;
  background:transparent;
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--violet),var(--ice));
  box-shadow:0 0 14px rgba(79,215,255,.5);
  transition:width .12s linear;
}

/* ---------- 05 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:3px;
  background:var(--raise);
  color:var(--text);
  font-size:13px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:border-color .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.btn:hover{border-color:var(--violet);transform:translateY(-1px)}
.btn--primary{
  background:var(--violet);
  border-color:var(--violet);
  color:#0A0410;
  font-weight:700;
}
.btn--primary:hover{background:var(--violet-lift);border-color:var(--violet-lift);color:#0A0410}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--ice);color:var(--ice);background:rgba(79,215,255,.06)}
.btn--quiet{
  background:transparent;
  border-color:transparent;
  color:var(--muted);
  padding-left:8px;
  padding-right:8px;
  font-weight:500;
}
.btn--quiet:hover{color:var(--ice);border-color:transparent;transform:none}
.btn--block{width:100%}

/* ---------- 06 状态标签与徽标 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid currentColor;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  line-height:1.6;
  white-space:nowrap;
}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor;flex:none}
.tag--accepted{color:var(--ice)}
.tag--progress{color:var(--violet)}
.tag--fixed{color:var(--teal)}
.tag--pending{color:var(--coral)}
.tag--error{color:var(--red)}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:3px;
  background:var(--raise);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ---------- 07 标题与正文 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--violet);
}
.eyebrow::before{content:"";display:block;width:18px;height:1px;background:currentColor}

.page-title{
  font-family:var(--font-display);
  font-size:clamp(28px,4.4vw,46px);
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.02em;
  line-height:1.12;
  margin-top:12px;
}
.display{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.025em;
  line-height:1.02;
}
.lede{
  margin-top:16px;
  max-width:46ch;
  font-size:clamp(15px,1.5vw,17.5px);
  line-height:1.8;
  color:var(--body-text);
}
.prose{max-width:62ch;font-size:15.5px;line-height:1.85;color:var(--body-text)}
.prose p + p{margin-top:1em}
.prose strong{color:var(--text);font-weight:600}

/* ---------- 08 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
}
.breadcrumbs li{display:flex;align-items:center}
.breadcrumbs li::after{content:"/";margin:0 9px;color:var(--line-strong)}
.breadcrumbs li:last-child::after{content:"";margin:0}
.breadcrumbs a{color:var(--muted);transition:color .16s var(--ease)}
.breadcrumbs a:hover{color:var(--ice)}
.breadcrumbs [aria-current="page"]{color:var(--text)}

/* ---------- 09 左右分屏与侧栏索引 ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(200px,248px) minmax(0,1fr);
  gap:32px;
  align-items:start;
}
.split--reverse{grid-template-columns:minmax(0,1fr) minmax(200px,288px)}
.split-aside{display:flex;flex-direction:column;gap:20px;min-width:0}

.side-index{
  position:sticky;
  top:132px;
  display:flex;
  flex-direction:column;
  gap:2px;
  padding-left:18px;
  border-left:1px solid var(--line);
}
.side-index-title{
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.side-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:7px 0;
  border-bottom:1px solid transparent;
  font-size:13.5px;
  line-height:1.5;
  color:var(--muted);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.side-link:hover{color:var(--text);border-bottom-color:var(--line-strong)}
.side-link[aria-current]{color:var(--ice)}
.side-link-index{
  flex:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  color:var(--violet);
}

/* ---------- 10 索引卡片 ---------- */
.card{
  position:relative;
  display:block;
  padding:20px;
  border:1px solid var(--line);
  border-radius:4px;
  background:var(--panel);
  box-shadow:var(--shadow-card);
  transition:border-color .16s var(--ease),background-color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.card:hover,.card:focus-within{
  border-color:rgba(164,92,255,.75);
  background:var(--raise);
  transform:translateY(-2px);
  box-shadow:var(--shadow-card-hover);
}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.card-kicker{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.card-title{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.01em;
  line-height:1.35;
  color:var(--text);
}
.card-text{margin-top:8px;font-size:14px;line-height:1.78;color:var(--muted)}
.card-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--ice);
}
.card-more::after{content:"→";transition:transform .16s var(--ease)}
.card:hover .card-more::after,
.card:focus-within .card-more::after{transform:translateX(4px)}

/* ---------- 11 全宽更新条带 ---------- */
.band{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
  padding:18px 22px;
  border:1px solid var(--line);
  border-left:3px solid var(--violet);
  border-radius:4px;
  background:linear-gradient(90deg, rgba(164,92,255,.13), rgba(13,16,23,0) 48%), var(--panel);
}
.band--coral{
  border-left-color:var(--coral);
  background:linear-gradient(90deg, rgba(255,122,74,.13), rgba(13,16,23,0) 48%), var(--panel);
}
.band--ice{
  border-left-color:var(--ice);
  background:linear-gradient(90deg, rgba(79,215,255,.11), rgba(13,16,23,0) 48%), var(--panel);
}
.band-main{flex:1 1 320px;min-width:0}
.band-title{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.01em;
  line-height:1.3;
}
.band-meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:var(--muted);
}

/* ---------- 12 等宽数据指标带 ---------- */
.stat-band{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;
  border:1px solid var(--line);
  border-radius:4px;
  background:var(--line);
  overflow:hidden;
}
.stat{display:flex;flex-direction:column;gap:4px;padding:16px 18px;background:var(--panel)}
.stat-value{
  font-family:var(--font-mono);
  font-size:24px;
  font-weight:700;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  color:var(--text);
}
.stat-value--ice{color:var(--ice)}
.stat-value--violet{color:var(--violet)}
.stat-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted-dim);
}

/* ---------- 13 纵向时间轴（回放轴） ---------- */
.timeline{position:relative;display:flex;flex-direction:column;padding-left:26px}
.timeline::before{
  content:"";
  position:absolute;
  left:6px;
  top:10px;
  bottom:10px;
  width:1px;
  background:linear-gradient(180deg,var(--violet),rgba(79,215,255,.42) 55%,transparent);
}
.timeline-item{position:relative;padding-bottom:30px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-26px;
  top:8px;
  width:11px;
  height:11px;
  border:1px solid var(--violet);
  border-radius:50%;
  background:var(--ink);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.timeline-item:hover::before,
.timeline-item:focus-within::before{
  background:var(--violet);
  border-color:var(--violet);
  box-shadow:0 0 0 4px rgba(164,92,255,.18);
}
.timeline-time{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.timeline-title{margin-top:4px;font-size:16px;font-weight:600;line-height:1.5;color:var(--text)}
.timeline-body{margin-top:6px;font-size:13.5px;line-height:1.8;color:var(--muted);max-width:58ch}
.timeline-extra{
  margin-top:8px;
  max-height:0;
  opacity:0;
  overflow:hidden;
  font-size:13px;
  line-height:1.8;
  color:var(--body-text);
  transition:max-height .2s var(--ease),opacity .2s var(--ease);
}
.timeline-item:hover .timeline-extra,
.timeline-item:focus-within .timeline-extra{max-height:260px;opacity:1}

/* ---------- 14 快筛标签 ---------- */
.filters{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--panel);
  color:var(--muted);
  font-size:12.5px;
  line-height:1.4;
  transition:border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease);
}
.filter-chip:hover{border-color:var(--ice);color:var(--ice)}
.filter-chip[aria-pressed="true"]{
  border-color:var(--violet);
  background:rgba(164,92,255,.14);
  color:var(--text);
}

/* ---------- 15 响应式图片容器 ---------- */
.figure{
  display:block;
  margin:0;
  border:1px solid var(--line);
  border-radius:4px;
  background:var(--panel);
  overflow:hidden;
}
.figure-media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background-color:#0A0C12;
  background-image:
    linear-gradient(rgba(38,45,59,.45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38,45,59,.45) 1px, transparent 1px),
    radial-gradient(120% 120% at 10% 0%, rgba(164,92,255,.16), transparent 58%),
    radial-gradient(120% 120% at 92% 100%, rgba(79,215,255,.12), transparent 62%);
  background-size:36px 36px, 36px 36px, auto, auto;
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:21 / 9}
.figure-media--tall{aspect-ratio:4 / 5}
.figure-media--square{aspect-ratio:1 / 1}
.figure-caption{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  padding:10px 14px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.05em;
  color:var(--muted);
}
.figure-badge{color:var(--ice)}

/* ---------- 16 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:96px;
  border-top:1px solid var(--line);
  background:var(--panel);
}
.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:56px var(--gutter) 40px;
  display:grid;
  grid-template-columns:minmax(260px,1.25fr) repeat(3,minmax(0,1fr));
  gap:40px 32px;
}
.footer-brand{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer-mark{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.01em;
  color:var(--text);
}
.footer-desc{max-width:32ch;font-size:13.5px;line-height:1.8;color:var(--muted)}
.footer-badges{display:flex;flex-wrap:wrap;gap:8px}

.footer-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ice);
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;
  padding-left:0;
  border-left:1px solid transparent;
  font-size:13.5px;
  line-height:1.6;
  color:var(--muted);
  transition:color .16s var(--ease),padding-left .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover{color:var(--text);padding-left:8px;border-left-color:var(--violet)}

.footer-items{display:flex;flex-direction:column;gap:12px}
.footer-item{display:flex;flex-direction:column;gap:2px;min-width:0}
.footer-item-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted-dim);
}
.footer-item-value{
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  word-break:break-word;
}
.footer-note{max-width:34ch;font-size:12.5px;line-height:1.75;color:var(--muted-dim)}

.footer-legal{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px var(--gutter) 34px;
  border-top:1px solid var(--line-soft);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted-dim);
}
.footer-legal-item{white-space:nowrap}

/* ---------- 17 视口轻显现 ---------- */
[data-reveal].is-hidden{opacity:0;transform:translateY(12px);transition:none}
[data-reveal].is-revealed{
  opacity:1;
  transform:translateY(0);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* ---------- 18 响应式 ---------- */
@media (max-width:1180px){
  .header-actions .btn--quiet{display:none}
}
@media (max-width:1024px){
  .split,.split--reverse{grid-template-columns:minmax(0,1fr);gap:26px}
  .side-index{
    position:static;
    padding-left:0;
    padding-top:14px;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .header-rail{height:0;min-height:0;padding:0;border-top:0;overflow:visible}
  .rail-label,.rail-meta{display:none}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:70;
    max-height:0;
    overflow:hidden;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 50px -34px rgba(0,0,0,1);
    transition:max-height .26s var(--ease);
  }
  .site-nav[data-open="true"]{max-height:min(76vh,540px);overflow-y:auto}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:6px var(--gutter) 16px}
  .nav-item{border-bottom:1px solid var(--line-soft)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{
    padding:15px 4px;
    border:0;
    border-radius:0;
    font-size:15.5px;
    justify-content:flex-start;
  }
  .nav-link:hover{background:transparent;border:0;color:var(--text)}
  .nav-link[aria-current="page"]{background:transparent;border:0;color:var(--ice)}
  .nav-label{white-space:normal}
}
@media (max-width:640px){
  :root{--gutter:16px}
  .section{padding:52px 0}
  .section--tight{padding:34px 0}
  .site-footer{margin-top:64px}
  .footer-inner{
    grid-template-columns:minmax(0,1fr);
    gap:32px;
    padding-top:44px;
    padding-bottom:30px;
  }
  .footer-legal{padding-bottom:28px}
  .stat-band{grid-template-columns:repeat(auto-fit,minmax(132px,1fr))}
  .stat{padding:14px}
  .stat-value{font-size:20px}
  .band{padding:16px;gap:12px}
}
@media (max-width:480px){
  .brand-sub{display:none}
  .brand-line{font-size:14px}
  .header-top{min-height:58px}
}

/* ---------- 19 降低动效偏好 ---------- */
@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].is-hidden{opacity:1;transform:none}
  .timeline-extra{max-height:none;opacity:1}
  .card:hover,.card:focus-within{transform:none}
  .btn:hover{transform:none}
  .state-dot{animation:none}
}