/* ===== 老虎游戏机站 · 共享层 /assets/site.css ===== */

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

:root{
  --ink:#07070C;
  --cabin:#0E0E16;
  --panel:#15151F;
  --violet:#7C3AED;
  --cyan:#22D3EE;
  --magenta:#F472B6;
  --amber:#FBBF24;
  --green:#2DD4BF;
  --white:#F5F7FA;
  --muted:#A7ADBB;
  --line:#2A2A3A;

  --font-display:"Noto Serif SC","Songti SC",serif;
  --font-body:"Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;

  --rail:88px;
  --rail-open:248px;
  --shell-max:1440px;
  --ease:cubic-bezier(.22,1,.36,1);
  --t-hover:180ms;
  --t-open:300ms;
}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:88px;
}

body{
  margin:0;
  min-height:100vh;
  padding-left:var(--rail);
  overflow-x:clip;
  background:
    radial-gradient(1200px 620px at 92% -12%, rgba(124,58,237,.20), transparent 62%),
    radial-gradient(900px 520px at 4% 106%, rgba(34,211,238,.13), transparent 62%),
    var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:clamp(15px,.45vw + 14px,17px);
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

img,picture,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.18;
  color:var(--white);
  letter-spacing:-.01em;
}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--white)}

ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:0 0 .35em}

strong{font-weight:700;color:var(--white)}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}

::selection{background:rgba(34,211,238,.32);color:var(--white)}

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

/* ---------- 排版工具 ---------- */
.display{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.6rem,6.4vw,6rem);
  line-height:1.02;
  letter-spacing:-.02em;
  transform:skewX(-6deg);
  transform-origin:left bottom;
  text-shadow:0 0 32px rgba(124,58,237,.35);
}

.section-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.6rem,2.6vw,2.5rem);
  line-height:1.2;
}

.lede{
  font-size:clamp(15px,1.1vw,18px);
  line-height:1.8;
  color:var(--muted);
  max-width:34em;
}

.label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
}
.label::before{
  content:"";
  width:18px;
  height:1px;
  background:currentColor;
  opacity:.75;
}

.data-num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}

/* ---------- 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,64px);
}

.section{padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--offset{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start}
.grid--offset > :nth-child(even){margin-top:clamp(16px,3vw,56px)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 20px;
  border:1px solid var(--line);
  border-radius:4px;
  background:transparent;
  color:var(--white);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:color var(--t-hover) var(--ease),border-color var(--t-hover) var(--ease),
             box-shadow var(--t-hover) var(--ease),transform var(--t-hover) var(--ease),
             background-color var(--t-hover) var(--ease);
}
.btn--primary{
  border-color:transparent;
  color:#07070C;
  background:linear-gradient(120deg,rgba(124,58,237,.96),rgba(34,211,238,.9));
  box-shadow:0 0 0 1px rgba(34,211,238,.35),0 14px 32px -18px rgba(124,58,237,.95);
}
.btn--primary:hover{
  color:#07070C;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px var(--cyan),0 0 26px -4px rgba(34,211,238,.7),0 16px 36px -18px rgba(124,58,237,1);
}
.btn--ghost{color:var(--muted)}
.btn--ghost:hover{
  color:var(--white);
  border-color:rgba(34,211,238,.65);
  box-shadow:0 0 20px -8px rgba(34,211,238,.65);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumbs li{margin:0;display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--line)}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--white)}

/* ---------- 卡片与标签 ---------- */
.card{
  position:relative;
  padding:clamp(16px,2vw,26px);
  border:1px solid var(--line);
  border-radius:6px;
  background:linear-gradient(160deg,var(--panel),#101018 70%,#0C0C14);
  box-shadow:0 22px 48px -38px rgba(0,0,0,.95);
}
.card--glow{
  border-color:rgba(124,58,237,.45);
  box-shadow:0 0 0 1px rgba(124,58,237,.28),0 26px 60px -42px rgba(34,211,238,.8);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line);
  border-radius:2px;
  background:rgba(21,21,31,.85);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.4;
}
.tag--on{
  border-color:transparent;
  background:var(--amber);
  color:#07070C;
  box-shadow:0 0 18px -6px rgba(251,191,36,.85);
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:6px;
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(124,58,237,.42), transparent 62%),
    radial-gradient(90% 80% at 12% 96%, rgba(34,211,238,.28), transparent 66%),
    linear-gradient(140deg,#15151F,#0B0B13 62%,#12121C);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(180deg,rgba(7,7,12,.30) 0 1px,transparent 1px 3px),
    linear-gradient(180deg,transparent 60%,rgba(7,7,12,.55));
}
.media-frame img,
.media-frame picture,
.media-frame svg,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__caption{
  position:absolute;
  left:12px;
  right:12px;
  bottom:10px;
  z-index:1;
  margin:0;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--white);
  text-shadow:0 1px 8px rgba(7,7,12,.9);
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
  will-change:opacity,transform;
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:calc(var(--rail) + 14px);
  z-index:200;
  padding:10px 16px;
  border-radius:2px;
  background:var(--cyan);
  color:#07070C;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  text-decoration:none;
  transform:translateY(-200%);
  transition:transform 200ms var(--ease);
}
.skip-link:focus{transform:none;color:#07070C}

/* ============================================================
   头部 · 侧边轨道
   ============================================================ */
.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:90;
  width:var(--rail);
  display:flex;
  flex-direction:column;
  align-items:stretch;
  padding:14px 0 18px;
  font-family:var(--font-mono);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail);
  z-index:-1;
  background:
    repeating-linear-gradient(180deg,rgba(245,247,250,.035) 0 1px,transparent 1px 4px),
    linear-gradient(180deg,#0B0B13 0%,#0E0E16 48%,#07070C 100%);
  border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(124,58,237,.28);
  transition:width var(--t-open) var(--ease);
  pointer-events:none;
}
.site-header::after{
  content:"";
  position:absolute;
  top:16%;
  left:0;
  width:2px;
  height:36%;
  z-index:-1;
  background:linear-gradient(180deg,transparent,var(--violet) 35%,var(--cyan) 75%,transparent);
  opacity:.8;
  pointer-events:none;
  transition:opacity var(--t-open) var(--ease);
}
.site-header:hover::before,
.site-header:focus-within::before{width:var(--rail-open)}
.site-header.is-scrolled::before{
  box-shadow:inset -1px 0 0 rgba(124,58,237,.45),18px 0 46px -34px rgba(0,0,0,1);
}

/* 品牌 */
.brand{
  position:relative;
  display:flex;
  align-items:center;
  min-height:48px;
  padding-left:22px;
  color:var(--white);
  text-decoration:none;
}
.brand__glyph{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  flex:0 0 44px;
  border-radius:5px;
  background:linear-gradient(145deg,var(--cyan),var(--violet) 78%);
  color:#07070C;
  font-family:var(--font-display);
  font-weight:900;
  font-size:23px;
  line-height:1;
  box-shadow:0 0 0 1px rgba(34,211,238,.5),0 12px 28px -14px rgba(124,58,237,.95);
  transition:box-shadow var(--t-hover) var(--ease);
}
.brand:hover .brand__glyph{
  box-shadow:0 0 0 1px var(--cyan),0 0 24px -4px rgba(34,211,238,.9),0 14px 30px -14px rgba(124,58,237,1);
}
.brand__text{
  position:absolute;
  left:78px;
  top:50%;
  display:flex;
  flex-direction:column;
  gap:3px;
  white-space:nowrap;
  pointer-events:none;
  opacity:0;
  transform:translate(-8px,-50%);
  transition:opacity 200ms var(--ease) 60ms,transform var(--t-open) var(--ease) 60ms;
}
.brand__name{
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--white);
}
.brand__tag{
  font-size:10px;
  letter-spacing:.1em;
  color:var(--cyan);
}
.site-header:hover .brand__text,
.site-header:focus-within .brand__text{opacity:1;transform:translate(0,-50%)}

/* 移动端按钮（桌面隐藏） */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  position:absolute;
  top:12px;
  right:14px;
  z-index:3;
  height:40px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:4px;
  background:rgba(21,21,31,.92);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color var(--t-hover) var(--ease),box-shadow var(--t-hover) var(--ease);
}
.nav-toggle:hover{border-color:rgba(34,211,238,.6);box-shadow:0 0 18px -8px rgba(34,211,238,.9)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{
  display:block;
  height:2px;
  background:var(--cyan);
  transition:transform 220ms var(--ease),opacity 160ms var(--ease);
}
.nav-toggle__label{line-height:1}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(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(-5px) rotate(-45deg)}

/* 导航 */
.site-nav{width:100%;margin:auto 0}
.site-nav__list{
  display:flex;
  flex-direction:column;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.site-nav__item{margin:0}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  min-height:46px;
  padding-left:22px;
  color:var(--muted);
  text-decoration:none;
  transition:color var(--t-hover) var(--ease);
}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  color:rgba(167,173,187,.5);
  transition:color var(--t-hover) var(--ease);
}
.nav-link__label{
  position:absolute;
  left:78px;
  white-space:nowrap;
  pointer-events:none;
  font-family:var(--font-body);
  font-size:14px;
  letter-spacing:.04em;
  color:var(--white);
  opacity:0;
  transform:translateX(-8px);
  transition:opacity 200ms var(--ease) 60ms,transform var(--t-open) var(--ease) 60ms;
}
.site-header:hover .nav-link__label,
.site-header:focus-within .nav-link__label{opacity:1;transform:none}
.nav-link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:2px;
  height:0;
  border-radius:2px;
  background:linear-gradient(180deg,var(--cyan),var(--violet));
  transform:translateY(-50%);
  transition:height var(--t-open) var(--ease),box-shadow var(--t-hover) var(--ease);
}
.nav-link:hover{color:var(--white)}
.nav-link:hover .nav-link__idx{color:var(--cyan)}
.nav-link:hover::before{height:22px}
.nav-link[aria-current="page"]{color:var(--white)}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--cyan)}
.nav-link[aria-current="page"]::before{
  height:30px;
  background:linear-gradient(180deg,var(--cyan),var(--magenta));
  box-shadow:0 0 14px rgba(34,211,238,.85);
}

/* 轨道底部 */
.rail-foot{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:12px;
  width:100%;
  padding-left:22px;
}
.rail-cta{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:4px;
  background:linear-gradient(140deg,var(--cyan),var(--violet));
  color:#07070C;
  text-decoration:none;
  box-shadow:0 0 0 1px rgba(34,211,238,.4),0 12px 26px -16px rgba(124,58,237,.95);
  transition:box-shadow var(--t-hover) var(--ease),transform var(--t-hover) var(--ease);
}
.rail-cta__icon{font-size:14px;line-height:1}
.rail-cta__label{
  position:absolute;
  left:58px;
  white-space:nowrap;
  pointer-events:none;
  font-family:var(--font-body);
  font-size:13px;
  font-weight:700;
  color:var(--white);
  opacity:0;
  transform:translateX(-8px);
  transition:opacity 200ms var(--ease) 60ms,transform var(--t-open) var(--ease) 60ms;
}
.site-header:hover .rail-cta__label,
.site-header:focus-within .rail-cta__label{opacity:1;transform:none}
.rail-cta:hover{
  color:#07070C;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px var(--cyan),0 0 22px -2px rgba(34,211,238,.9);
}
.rail-meta{
  margin:0;
  white-space:nowrap;
  pointer-events:none;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  color:rgba(167,173,187,.75);
  opacity:0;
  transform:translateX(-6px);
  transition:opacity 200ms var(--ease) 90ms,transform var(--t-open) var(--ease) 90ms;
}
.site-header:hover .rail-meta,
.site-header:focus-within .rail-meta{opacity:1;transform:none}

/* 阅读进度 */
.rail-progress{
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  width:2px;
  background:rgba(42,42,58,.75);
  pointer-events:none;
}
.rail-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleY(0);
  transform-origin:top center;
  background:linear-gradient(180deg,var(--cyan),var(--violet) 58%,var(--magenta));
  box-shadow:0 0 10px rgba(34,211,238,.75);
  transition:transform 120ms linear;
}

/* 移动快捷坞（桌面隐藏） */
.dock{display:none}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#0A0A11 0%,var(--cabin) 42%,#07070C 100%);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--violet) 22%,var(--cyan) 52%,var(--magenta) 78%,transparent);
  opacity:.85;
}
.site-footer::after{
  content:"";
  position:absolute;
  right:-12%;
  bottom:-45%;
  width:min(60vw,640px);
  height:min(60vw,640px);
  border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.24),transparent 66%);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  z-index:1;
  padding-block:clamp(40px,6vw,72px) 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(210px,1.4fr) repeat(3,minmax(120px,.8fr)) minmax(220px,1.2fr);
  gap:clamp(20px,3vw,44px);
  align-items:start;
}
.footer-brand__mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--white);
  text-decoration:none;
}
.footer-brand__glyph{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:4px;
  background:linear-gradient(145deg,var(--cyan),var(--violet));
  color:#07070C;
  font-family:var(--font-display);
  font-weight:900;
  font-size:18px;
  line-height:1;
  box-shadow:0 0 0 1px rgba(34,211,238,.4);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:18px;
  letter-spacing:.02em;
}
.footer-brand__tagline{
  margin:16px 0 6px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:20px;
  line-height:1.3;
  color:var(--white);
  transform:skewX(-6deg);
  transform-origin:left center;
}
.footer-brand__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-links li{margin:0}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
  font-size:14px;
  text-decoration:none;
  transition:color var(--t-hover) var(--ease);
}
.footer-links a::before{
  content:"";
  width:10px;
  height:1px;
  background:var(--line);
  transition:width 200ms var(--ease),background-color 200ms var(--ease);
}
.footer-links a:hover{color:var(--white)}
.footer-links a:hover::before{width:18px;background:var(--cyan)}
.footer-contact__list{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-contact__row{
  display:flex;
  flex-direction:column;
  gap:2px;
  margin:0;
  padding-bottom:10px;
  border-bottom:1px dashed rgba(42,42,58,.95);
}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(167,173,187,.65);
}
.footer-contact__value{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  color:var(--white);
  word-break:break-word;
}
.footer-contact__note{
  margin:12px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--muted);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,46px);
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:rgba(167,173,187,.85);
}
.footer-legal{
  margin:0;
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--muted);
}
.footer-note{margin:0}

/* ============================================================
   响应式 · 平板与手机
   ============================================================ */
@media (max-width:1180px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:1023px){
  html{scroll-padding-top:76px}

  body{
    padding-left:0;
    padding-top:64px;
    padding-bottom:80px;
  }
  body.nav-open{overflow:hidden}

  .skip-link{left:12px}

  .site-header{
    top:0;
    left:0;
    right:0;
    bottom:auto;
    width:100%;
    height:64px;
    padding:0;
    overflow:hidden;
    transition:height 340ms var(--ease);
  }
  .site-header::before{
    width:100%;
    height:100%;
    border-right:0;
    border-bottom:1px solid var(--line);
    box-shadow:inset 0 -1px 0 rgba(124,58,237,.3);
    transition:none;
  }
  .site-header:hover::before,
  .site-header:focus-within::before{width:100%}
  .site-header::after{
    top:0;
    left:auto;
    right:0;
    width:38%;
    height:2px;
    background:linear-gradient(90deg,transparent,var(--violet),var(--cyan));
    opacity:.9;
  }
  .site-header[data-open]{height:100dvh}
  .site-header.is-scrolled::before{
    box-shadow:inset 0 -1px 0 rgba(34,211,238,.45),0 14px 34px -26px rgba(0,0,0,1);
  }

  .brand{
    position:absolute;
    top:0;
    left:0;
    height:64px;
    padding-left:14px;
  }
  .brand__glyph{width:36px;height:36px;flex-basis:36px;font-size:19px}
  .brand__text{
    position:static;
    transform:none;
    opacity:1;
    margin-left:10px;
    padding-right:96px;
  }
  .brand__name{font-size:14px}
  .brand__tag{font-size:9px;letter-spacing:.08em}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:absolute;
    top:64px;
    left:0;
    right:0;
    margin:0;
    padding:6px 16px 0;
    max-height:calc(100dvh - 170px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity 200ms var(--ease),transform 300ms var(--ease),visibility 0s linear 320ms;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:none;
    transition:opacity 200ms var(--ease) 60ms,transform 320ms var(--ease) 60ms,visibility 0s linear 0s;
  }
  .site-nav__list{gap:0}
  .nav-link{
    min-height:54px;
    padding-left:4px;
    border-bottom:1px solid var(--line);
  }
  .nav-link__idx{width:34px;flex:0 0 34px;font-size:12px;color:var(--cyan)}
  .nav-link__label{
    position:static;
    left:auto;
    opacity:1;
    transform:none;
    font-size:16px;
    transition:none;
  }
  .nav-link::before{left:-16px}
  .nav-link:hover::before,
  .nav-link[aria-current="page"]::before{height:26px}

  .rail-foot{
    position:absolute;
    left:16px;
    right:16px;
    bottom:24px;
    padding-left:0;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    opacity:0;
    visibility:hidden;
    transition:opacity 200ms var(--ease),visibility 0s linear 320ms;
  }
  .site-header[data-open] .rail-foot{
    opacity:1;
    visibility:visible;
    transition:opacity 220ms var(--ease) 120ms,visibility 0s linear 0s;
  }
  .rail-cta{width:auto;height:44px;padding:0 18px}
  .rail-cta__label{
    position:static;
    left:auto;
    opacity:1;
    transform:none;
    font-size:13px;
  }
  .rail-meta{display:none}
  .rail-progress{display:none}

  .dock{
    display:block;
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:85;
    padding:8px 8px calc(8px + env(safe-area-inset-bottom));
    border-top:1px solid var(--line);
    background:rgba(10,10,17,.94);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
  }
  .dock__list{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:4px;
    margin:0;
    padding:0;
    list-style:none;
  }
  .dock__item{margin:0}
  .dock__link{
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:3px;
    padding:6px 2px;
    border:1px solid transparent;
    border-radius:6px;
    color:var(--muted);
    font-family:var(--font-mono);
    font-size:10px;
    letter-spacing:.08em;
    text-decoration:none;
    transition:color var(--t-hover) var(--ease),border-color var(--t-hover) var(--ease),background-color var(--t-hover) var(--ease);
  }
  .dock__icon{font-size:13px;line-height:1;color:rgba(167,173,187,.9)}
  .dock__label{line-height:1.2}
  .dock__link:hover{color:var(--white);border-color:rgba(42,42,58,1)}
  .dock__link[aria-current="page"]{
    color:var(--white);
    border-color:rgba(34,211,238,.5);
    background:rgba(34,211,238,.08);
  }
  .dock__link[aria-current="page"] .dock__icon{
    color:var(--cyan);
    text-shadow:0 0 12px rgba(34,211,238,.9);
  }

  .grid--2,.grid--3,.grid--offset{grid-template-columns:minmax(0,1fr)}
  .grid--offset > :nth-child(even){margin-top:0}
}

@media (max-width:900px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ============================================================
   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;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .rail-progress__bar{transition:none}
}