/* ============================================================
   开心体育 / kaixin-sport.com.cn
   site.css —— 共享外壳、基础组件与图形容器
   夜场记分牌：暗场底 + 战术板细线 + 玻璃层 + 实色数据锚点
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root{
  --ink-900:#0B1220;
  --ink-800:#121A2B;
  --ink-700:#1A2436;
  --green:#00E676;
  --green-deep:#062A1B;
  --cyan:#00F5D4;
  --orange:#FF6B35;
  --blue:#1E6BFF;
  --purple:#7C4DFF;
  --paper:#E9F0EE;
  --white:#F5F8F7;
  --gray:#8A94A6;
  --line:#2A3547;
  --line-soft:rgba(42,53,71,.62);
  --rail-w:274px;
  --page-max:1180px;
  --gut:clamp(16px, 3.4vw, 44px);
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --font-head:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --glow-green:0 18px 48px -22px rgba(0,230,118,.8);
  --glow-cyan:0 0 0 1px rgba(0,245,212,.28), 0 14px 36px -20px rgba(0,245,212,.7);
}

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

body{
  margin:0;
  min-height:100vh;
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(42,53,71,.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42,53,71,.26) 1px, transparent 1px),
    radial-gradient(1100px 640px at 80% -10%, rgba(0,230,118,.14), transparent 70%),
    radial-gradient(900px 540px at 4% 10%, rgba(30,107,255,.13), transparent 72%);
  background-size:76px 76px, 76px 76px, auto, auto;
  background-repeat:repeat, repeat, no-repeat, no-repeat;
  background-attachment:fixed, fixed, fixed, fixed;
}

h1,h2,h3,h4{
  margin:0 0 .5em;
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--white);
}
h1{ font-size:clamp(38px, 6.6vw, 84px); }
h2{ font-size:clamp(26px, 3.6vw, 44px); }
h3{ font-size:clamp(19px, 2.2vw, 26px); }
h4{ font-size:17px; letter-spacing:0; }

p{ margin:0 0 1em; }
a{ color:var(--cyan); text-decoration:none; }
a:hover{ color:var(--green); }
ul,ol{ margin:0 0 1em; padding-left:1.15em; }
img,svg{ max-width:100%; }
button{ font:inherit; color:inherit; }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

/* ---------- 工具类 ---------- */
.container{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
}
.stack{ display:flex; flex-direction:column; gap:clamp(14px,2vw,24px); }
.mono{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; letter-spacing:.02em; }
.muted{ color:var(--gray); }
.eyebrow{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}
.rule{
  height:1px; border:0; margin:clamp(20px,3vw,36px) 0;
  background:linear-gradient(90deg, var(--line), rgba(0,230,118,.5) 28%, var(--line) 78%);
}
.divider{
  height:1px; border:0; margin:0;
  background-image:repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 18px);
}
.split{
  display:grid;
  gap:clamp(18px,3vw,40px);
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
}
.grid-auto{
  display:grid;
  gap:clamp(14px,2vw,22px);
  grid-template-columns:repeat(auto-fit, minmax(240px,1fr));
}

/* ---------- 章节标题 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 16px;
  padding-bottom:14px;
  margin-bottom:clamp(18px,2.6vw,30px);
  border-bottom:1px solid var(--line);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  color:var(--green);
}
.section-head__title{ margin:0; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--r-md);
  font-family:var(--font-head);
  font-size:15px;
  font-weight:800;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover{ transform:translateY(-2px); }
.btn--primary{ background:var(--green); color:#04231a; box-shadow:var(--glow-green); }
.btn--primary:hover{ background:var(--cyan); color:#04231a; }
.btn--ghost{ background:rgba(18,26,43,.7); border-color:var(--line); color:var(--white); }
.btn--ghost:hover{ border-color:var(--cyan); color:var(--cyan); }
.btn--alert{ background:var(--orange); color:#1b0a02; }
.btn--alert:hover{ background:#ff8155; color:#1b0a02; }

/* ---------- 标签与徽记 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(18,26,43,.72);
  font-size:13px;
  color:var(--gray);
  cursor:pointer;
  transition:color .16s ease, border-color .16s ease, background-color .16s ease;
}
.chip:hover{ color:var(--white); border-color:var(--cyan); }
.chip[aria-pressed="true"]{ background:var(--green-deep); border-color:var(--green); color:var(--green); }
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  background:var(--green-deep);
  color:var(--green);
}
.tag--purple{ background:rgba(124,77,255,.16); color:#B9A6FF; }
.tag--orange{ background:rgba(255,107,53,.16); color:#FFB394; }
.tag--blue{ background:rgba(30,107,255,.16); color:#9DC0FF; }

/* ---------- 卡片与数据 ---------- */
.card{
  position:relative;
  padding:clamp(16px,2.4vw,26px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--ink-800);
}
.card--glass{
  background:linear-gradient(180deg, rgba(26,36,54,.72), rgba(11,18,32,.66));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:inset 0 1px 0 rgba(245,248,247,.05);
}
.stat{ display:flex; flex-direction:column; gap:4px; }
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(32px,5vw,64px);
  line-height:1;
  color:var(--cyan);
  font-variant-numeric:tabular-nums;
}
.stat__label{
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gray);
}

/* ---------- 表格 ---------- */
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(18,26,43,.6);
  -webkit-overflow-scrolling:touch;
}
.data-table{
  width:100%;
  min-width:560px;
  border-collapse:collapse;
  font-size:15px;
}
.data-table caption{
  padding:11px 14px;
  text-align:left;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--gray);
  border-bottom:1px solid var(--line);
}
.data-table th,
.data-table td{
  padding:11px 14px;
  text-align:left;
  border-bottom:1px solid var(--line-soft);
}
.data-table thead th{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--gray);
  background:rgba(11,18,32,.7);
}
.data-table tbody tr:hover{ background:rgba(0,230,118,.06); }
.data-table td.mono{ color:var(--cyan); }

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  padding:0;
  list-style:none;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--gray);
}
.breadcrumb a{ color:var(--gray); }
.breadcrumb a:hover{ color:var(--cyan); }
.breadcrumb__sep{ color:var(--line); }
.breadcrumb [aria-current="page"]{ color:var(--white); }

/* ---------- 正文长文 ---------- */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.8;
}
.prose h2{ margin-top:1.6em; font-size:clamp(22px,2.6vw,30px); }
.prose h3{ margin-top:1.4em; }
.prose p{ margin:0 0 1.15em; color:#DDE5E3; }
.prose li{ margin-bottom:.5em; color:#DDE5E3; }
.prose strong{ color:var(--white); }
.prose blockquote{
  margin:1.4em 0;
  padding:14px 18px;
  border-left:3px solid var(--green);
  background:var(--green-deep);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:#DDE5E3;
}

/* ---------- 图表容器（供页面阶段放置图片/SVG） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background-color:var(--ink-800);
  background-image:
    linear-gradient(135deg, rgba(0,230,118,.16), transparent 46%),
    linear-gradient(0deg, rgba(30,107,255,.16), transparent 60%),
    repeating-linear-gradient(135deg, rgba(42,53,71,.5) 0 2px, transparent 2px 12px);
}
.media-frame img,
.media-frame svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg, transparent 42%, rgba(11,18,32,.72));
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame--square{ aspect-ratio:1 / 1; }
.media-frame__label{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:1;
  padding:4px 10px;
  border-radius:6px;
  background:rgba(11,18,32,.82);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.media-frame__caption{
  display:block;
  margin-top:8px;
  font-size:12px;
  color:var(--gray);
}

/* ---------- 章节目录 ---------- */
.toc{
  position:sticky;
  top:calc(var(--gut) + 12px);
  padding:16px 16px 18px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(18,26,43,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.toc__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gray);
}
.toc__link{
  display:block;
  padding:7px 10px;
  border-left:2px solid transparent;
  border-radius:0 6px 6px 0;
  font-size:14px;
  color:var(--gray);
  text-decoration:none;
  transition:color .16s ease, background-color .16s ease, border-color .16s ease;
}
.toc__link:hover{ color:var(--white); background:rgba(0,230,118,.08); }
.toc__link.is-active{
  color:var(--green);
  border-left-color:var(--green);
  background:linear-gradient(90deg, rgba(0,230,118,.16), transparent);
}

/* ---------- 显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s ease, transform .5s ease;
}
.reveal.is-in{ opacity:1; transform:none; }

/* ---------- 滚动进度与返回顶部 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:160;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg, var(--green), var(--cyan));
  pointer-events:none;
}
.back-to-top{
  position:fixed;
  right:18px;
  bottom:18px;
  z-index:150;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(11,18,32,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  color:var(--white);
  font-size:13px;
  font-weight:700;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s ease, transform .24s ease, visibility .24s;
}
.back-to-top.is-visible{ opacity:1; visibility:visible; transform:none; }
.back-to-top:hover{ border-color:var(--cyan); color:var(--cyan); }

/* ============================================================
   头部：桌面竖轨 / 移动抽屉
   ============================================================ */
.skip-link{
  position:fixed;
  top:-70px;
  left:14px;
  z-index:220;
  padding:10px 18px;
  border-radius:var(--r-md);
  background:var(--green);
  color:#04231a;
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{ top:14px; color:#04231a; }

.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:120;
  display:flex;
  flex-direction:column;
  gap:22px;
  padding:28px 20px 20px;
  background:linear-gradient(180deg, rgba(18,26,43,.94), rgba(11,18,32,.97));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  top:0;
  right:-1px;
  width:2px;
  height:38%;
  background:linear-gradient(180deg, var(--green), var(--cyan) 45%, transparent);
  opacity:.75;
}

.rail-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--white);
  text-decoration:none;
}
.brand:hover{ color:var(--white); }
.brand__mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:13px;
  background:linear-gradient(140deg, var(--green), var(--cyan));
  color:#04231a;
  font-family:var(--font-head);
  font-size:21px;
  font-weight:800;
  box-shadow:var(--glow-green);
}
.brand__text{ display:flex; flex-direction:column; gap:2px; }
.brand__name{
  font-family:var(--font-head);
  font-size:17px;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.2;
}
.brand__line{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--gray);
  line-height:1.3;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(11,18,32,.7);
  cursor:pointer;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:20px;
  height:12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:var(--green);
  transition:transform .22s ease, top .22s ease;
}
.nav-toggle__bars::before{ top:1px; }
.nav-toggle__bars::after{ top:9px; }
.nav-toggle__text{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--white);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{ top:6px; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{ top:6px; transform:rotate(-45deg); }

.site-nav{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  gap:6px;
  min-height:0;
  overflow-y:auto;
}
.site-nav__eyebrow{
  margin:0 0 8px;
  padding-left:14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--gray);
}
.site-nav__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.site-nav__list a{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 12px 11px 14px;
  border-left:2px solid transparent;
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:rgba(245,248,247,.8);
  font-family:var(--font-head);
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  transition:color .16s ease, background-color .16s ease, border-color .16s ease;
}
.site-nav__num{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.08em;
  color:var(--gray);
}
.site-nav__list a:hover{
  color:var(--white);
  background:rgba(0,230,118,.09);
  border-left-color:var(--cyan);
}
.site-nav__list a[aria-current="page"]{
  color:var(--green);
  background:linear-gradient(90deg, rgba(0,230,118,.17), transparent);
  border-left-color:var(--green);
}
.site-nav__list a[aria-current="page"] .site-nav__num{ color:var(--green); }

.rail-cta{
  display:block;
  margin-top:12px;
  padding:13px 16px;
  border-radius:var(--r-md);
  background:var(--green);
  color:#04231a;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:800;
  text-align:center;
  text-decoration:none;
  box-shadow:var(--glow-green);
  transition:background-color .18s ease, transform .18s ease;
}
.rail-cta:hover{ background:var(--cyan); color:#04231a; transform:translateY(-2px); }

.rail-foot{
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--gray);
}
.rail-foot__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(0,230,118,.16);
}

@media (min-width:1080px){
  body{ padding-left:var(--rail-w); }
  .scroll-progress{ left:var(--rail-w); }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(34px,5vw,68px) var(--gut) 26px;
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 300px at 12% 0%, rgba(0,230,118,.12), transparent 68%),
    linear-gradient(180deg, rgba(6,42,27,.55), var(--ink-900) 62%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(320px, 42%);
  height:2px;
  background:linear-gradient(90deg, var(--green), var(--cyan), transparent);
}
.footer__grid{
  max-width:var(--page-max);
  margin-inline:auto;
  display:grid;
  gap:clamp(24px,3.4vw,46px);
  grid-template-columns:minmax(0,1.45fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);
}
.footer__brand{ display:flex; flex-direction:column; gap:10px; }
.footer__eyebrow{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--green);
}
.footer__claim{
  margin:0;
  font-family:var(--font-head);
  font-size:clamp(19px,2.2vw,25px);
  font-weight:800;
  line-height:1.3;
  color:var(--white);
  letter-spacing:-.01em;
}
.footer__note{
  margin:0;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.75;
  color:var(--gray);
}
.footer__meta{
  margin:0;
  align-self:flex-start;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--gray);
}
.footer__col{ display:flex; flex-direction:column; gap:12px; }
.footer__col-title{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer__list a{
  display:inline-block;
  font-size:14.5px;
  color:rgba(245,248,247,.74);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s ease, border-color .16s ease;
}
.footer__list a:hover{ color:var(--cyan); border-bottom-color:rgba(0,245,212,.5); }
.footer__col--contact{ gap:9px; }
.footer__contact-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  font-size:14px;
  color:rgba(245,248,247,.84);
  line-height:1.6;
}
.footer__contact-key{
  min-width:36px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--gray);
}
.copy-btn{
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--gray);
  cursor:pointer;
  transition:color .16s ease, border-color .16s ease;
}
.copy-btn:hover{ color:var(--cyan); border-color:var(--cyan); }
.copy-btn.is-copied{ color:var(--green); border-color:var(--green); }
.footer__cta{ align-self:flex-start; margin-top:6px; }
.footer__bar{
  max-width:var(--page-max);
  margin:clamp(28px,4vw,48px) auto 0;
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 22px;
  font-size:12.5px;
  color:var(--gray);
}
.footer__copyright{ margin:0; font-family:var(--font-mono); letter-spacing:.06em; }
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin:0;
}
.footer__legal a{ color:var(--gray); }
.footer__legal a:hover{ color:var(--cyan); }

/* ============================================================
   响应式：移动顶栏 + 抽屉
   ============================================================ */
@media (max-width:1079px){
  html.nav-open{ overflow:hidden; }
  body{ padding-left:0; }
  .site-header{
    position:sticky;
    top:0;
    left:auto;
    right:auto;
    bottom:auto;
    width:100%;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:11px var(--gut);
    border-right:0;
    border-bottom:1px solid var(--line);
    background:rgba(11,18,32,.94);
  }
  .site-header::after{ display:none; }
  .rail-top{ width:100%; }
  .nav-toggle{ display:inline-flex; }
  .rail-foot{ display:none; }
  .site-nav{
    position:fixed;
    top:0;
    left:0;
    right:0;
    bottom:0;
    z-index:130;
    flex:0 0 auto;
    padding:84px var(--gut) 32px;
    gap:8px;
    background:linear-gradient(180deg, #0E1626, #0B1220 70%);
    border-bottom:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .24s ease, transform .24s ease, visibility .24s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-nav__eyebrow{ padding-left:12px; }
  .site-nav__list a{
    padding:15px 12px;
    font-size:19px;
    border-left-width:3px;
  }
  .rail-cta{ margin-top:16px; padding:16px; font-size:16px; }
  .toc{ position:static; }
  .split{ grid-template-columns:minmax(0,1fr); }
}

@media (max-width:900px){
  .footer__grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .footer__brand{ grid-column:1 / -1; }
}

@media (max-width:640px){
  body{ font-size:16px; }
  .footer__grid{ grid-template-columns:minmax(0,1fr); }
  .footer__bar{ justify-content:flex-start; }
  .back-to-top{ right:12px; bottom:12px; padding:10px 14px; font-size:12px; }
  .data-table{ min-width:480px; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{ opacity:1; transform:none; }
}