/* ============================================================
   米乐赛场 · 共享套件 /assets/site.css
   深墨绿夜场底 / 荧光青信号 / 暖橙节点 / 等宽索引
   ============================================================ */

:root{
  --ink-green:#0E2A23;
  --ink-green-deep:#0A1F1A;
  --char:#14161A;
  --cyan:#3FE0C8;
  --orange:#FF7A2F;
  --cream:#F4EFE6;
  --brown:#2A2118;
  --moss:#6F8C82;
  --amber:#FFD166;
  --smoke:#8A9199;

  --rail-w:96px;
  --topbar-h:64px;

  --radius-s:20px;
  --radius-m:28px;
  --radius-l:36px;

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

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:320ms;
  --edge:rgba(111,140,130,.28);
  --edge-soft:rgba(111,140,130,.16);
}

/* ---------- reset & base ---------- */
*,*::before,*::after{box-sizing:border-box}

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

html.nav-open,
html.nav-open body{overflow:hidden}

body{
  margin:0;
  padding-left:var(--rail-w);
  background:var(--ink-green);
  color:var(--cream);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit}

::selection{background:var(--cyan);color:var(--ink-green)}

#main-content{display:block;scroll-margin-top:calc(var(--topbar-h) + 8px)}

/* ---------- 可访问性 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  transform:translateY(-180%);
  padding:10px 18px;
  border-radius:999px;
  background:var(--cyan);
  color:var(--ink-green);
  font-weight:700;
  font-size:14px;
  letter-spacing:.06em;
  text-decoration:none;
  transition:transform 200ms var(--ease);
}
.skip-link:focus{transform:translateY(0)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 文字刻度 ---------- */
.display{
  margin:0;
  font-size:clamp(48px,9vw,152px);
  line-height:.92;
  font-weight:800;
  letter-spacing:-.03em;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  letter-spacing:.02em;
}
.eyebrow{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--moss);
}
.lede{
  margin:0;
  font-size:clamp(17px,1.5vw,19px);
  line-height:1.75;
  max-width:34ch;
  color:rgba(244,239,230,.82);
}
.annot{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--smoke);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid rgba(63,224,200,.42);
  background:rgba(63,224,200,.09);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  line-height:1.4;
}
.tag-amber{
  border-color:rgba(255,209,102,.45);
  background:rgba(255,209,102,.09);
  color:var(--amber);
}
.stack{display:grid;gap:18px}

/* ---------- 布局容器 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.container-narrow{max-width:860px}

.section{padding-block:clamp(32px,5vw,64px)}
.section-head{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:clamp(20px,3vw,32px);
}

.grid{display:grid;gap:clamp(20px,3vw,32px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid-2-1{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.grid-3-4{grid-template-columns:minmax(0,3fr) minmax(0,4fr)}

/* ---------- 画板 ---------- */
.panel{
  position:relative;
  background:var(--char);
  border:1px solid var(--edge-soft);
  border-radius:var(--radius-l);
  padding:clamp(22px,3.4vw,40px);
  overflow:hidden;
}
.panel--paper{
  background:var(--cream);
  color:var(--brown);
  border-color:rgba(42,33,24,.14);
}
.panel--paper .annot{color:rgba(42,33,24,.6)}
.panel--paper .lede{color:rgba(42,33,24,.84)}
.panel-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  flex-wrap:wrap;
  margin-bottom:18px;
}
.panel-index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--amber);
}
.panel-title{
  margin:0;
  font-size:clamp(20px,2.4vw,28px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.3;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6em;
  min-height:48px;
  padding:0 26px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:inherit;
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:transform 180ms var(--ease),background-color 180ms var(--ease),
             border-color 180ms var(--ease),color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.btn-primary{
  background:var(--orange);
  color:var(--char);
  box-shadow:0 10px 26px rgba(255,122,47,.26);
}
.btn-primary:hover{
  background:#ff8b48;
  transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(255,122,47,.34);
}
.btn-ghost{
  background:transparent;
  color:var(--cream);
  border-color:rgba(244,239,230,.28);
}
.btn-ghost:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-2px);
}
.btn-sm{min-height:40px;padding:0 18px;font-size:13.5px}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--smoke);
}
.breadcrumbs-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumbs-item{display:flex;align-items:center;gap:8px}
.breadcrumbs-item + .breadcrumbs-item::before{
  content:"/";
  color:rgba(111,140,130,.7);
}
.breadcrumbs-item a{
  color:rgba(244,239,230,.72);
  text-decoration:none;
  transition:color 180ms var(--ease);
}
.breadcrumbs-item a:hover{color:var(--cyan)}
.breadcrumbs-item[aria-current="page"]{color:var(--cyan)}

/* ---------- 分段切换 ---------- */
.tabs{display:grid;gap:20px}
.tab-list{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  width:fit-content;
  max-width:100%;
  padding:6px;
  border:1px solid var(--edge-soft);
  border-radius:999px;
  background:rgba(20,22,26,.72);
}
.tab{
  appearance:none;
  border:0;
  background:transparent;
  color:rgba(244,239,230,.7);
  font-family:inherit;
  font-size:14px;
  letter-spacing:.04em;
  padding:10px 18px;
  border-radius:999px;
  cursor:pointer;
  transition:background-color 180ms var(--ease),color 180ms var(--ease);
}
.tab:hover{color:var(--cream)}
.tab[aria-selected="true"]{
  background:var(--cyan);
  color:var(--ink-green);
  font-weight:700;
}
.tab-panel{display:none}
.tab-panel[data-active="true"]{
  display:block;
  animation:tab-slide 180ms var(--ease) both;
}
@keyframes tab-slide{
  from{opacity:0;transform:translateX(12px)}
  to{opacity:1;transform:none}
}

/* ---------- 图像容器（页面阶段放置占位） ---------- */
.figure{
  position:relative;
  margin:0;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--radius-m);
  border:1px solid var(--edge-soft);
  background:linear-gradient(160deg,var(--char),var(--ink-green-deep));
}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(63,224,200,.07) 0 1px,transparent 1px 14px);
}
.figure-media{
  display:block;
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  filter:saturate(.92) contrast(1.05);
}
.figure-media--tall{aspect-ratio:3/4}
.figure-media--wide{aspect-ratio:21/9}
.figure-cap{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cream);
  background:linear-gradient(0deg,rgba(10,31,26,.92),rgba(10,31,26,0));
}

/* ============================================================
   头部：左侧垂直轨道
   ============================================================ */
.site-header{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  width:var(--rail-w);
  z-index:100;
  background:linear-gradient(180deg,var(--ink-green) 0%,var(--char) 100%);
  border-inline-end:1px solid var(--edge);
}

.scroll-meter{
  position:fixed;
  inset-block-start:0;
  inset-inline:0;
  height:3px;
  z-index:120;
  pointer-events:none;
  background:rgba(111,140,130,.16);
}
.scroll-meter-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width 120ms linear;
}

.rail-inner{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:100%;
  padding:20px 8px 18px;
}

.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  padding:4px;
  border-radius:16px;
  text-decoration:none;
  color:inherit;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:6px 9px;
  border-radius:12px;
  border:1px solid rgba(63,224,200,.42);
  background:rgba(63,224,200,.1);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:18px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1;
}
.brand-text{
  display:flex;
  flex-direction:row;
  align-items:flex-start;
  gap:8px;
}
.brand-name{
  writing-mode:vertical-rl;
  font-size:14px;
  font-weight:700;
  letter-spacing:.3em;
  line-height:1.1;
  color:var(--cream);
}
.brand-tag{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.2em;
  line-height:1.2;
  color:var(--moss);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border:1px solid rgba(63,224,200,.34);
  border-radius:999px;
  background:transparent;
  color:var(--cream);
  font-size:13px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color 180ms var(--ease),color 180ms var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-box{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:16px;
  height:12px;
}
.nav-toggle-box span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform 180ms var(--ease),opacity 180ms var(--ease);
}
.nav-toggle-text{line-height:1}

.site-nav{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  min-height:0;
  overflow-y:auto;
}
.site-nav::-webkit-scrollbar{width:0;height:0}

.nav-list{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  width:100%;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-item{width:100%;display:flex;justify-content:center}

.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  padding:8px 10px;
  border:1px solid transparent;
  border-radius:16px;
  color:rgba(244,239,230,.74);
  text-decoration:none;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),
             background-color 180ms var(--ease),transform 180ms var(--ease);
}
.nav-link:hover{
  color:var(--cyan);
  border-color:rgba(63,224,200,.28);
  transform:translateY(-1px);
}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(63,224,200,.1);
  border-color:rgba(63,224,200,.36);
}
.nav-link[aria-current="page"] .nav-index{color:var(--orange)}

.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  line-height:1;
  color:var(--moss);
  transition:color 180ms var(--ease);
}
.nav-label{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:13px;
  letter-spacing:.18em;
  line-height:1;
}

.rail-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  width:46px;
  padding:18px 6px;
  border-radius:999px;
  background:var(--orange);
  color:var(--char);
  font-weight:700;
  text-decoration:none;
  box-shadow:0 10px 26px rgba(255,122,47,.28);
  transition:transform 180ms var(--ease),background-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.rail-cta:hover{
  background:#ff8b48;
  transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(255,122,47,.36);
}
.rail-cta-label{
  writing-mode:vertical-rl;
  font-size:13px;
  letter-spacing:.22em;
  line-height:1;
}

.rail-ticks{
  width:10px;
  height:52px;
  background:repeating-linear-gradient(to bottom,rgba(111,140,130,.55) 0 1px,transparent 1px 8px);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,80px);
  padding-top:clamp(38px,5vw,68px);
  background:var(--char);
  border-top:1px solid rgba(63,224,200,.16);
  color:var(--cream);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(111,140,130,.09) 0 1px,transparent 1px 26px);
  opacity:.7;
}
.footer-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(28px,4vw,56px);
  max-width:1200px;
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.footer-brand{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:14px;
}
.footer-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:6px 10px;
  border-radius:12px;
  border:1px solid rgba(255,209,102,.42);
  background:rgba(255,209,102,.1);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1;
}
.footer-brandline{
  font-size:20px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.35;
}
.footer-summary{
  max-width:34ch;
  font-size:15px;
  line-height:1.75;
  color:rgba(244,239,230,.72);
}
.footer-cta{margin-top:4px}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{min-width:0}
.footer-col-title{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--amber);
}
.footer-list{
  display:grid;
  gap:10px;
  margin:16px 0 0;
  padding:0;
  list-style:none;
}
.footer-link{
  display:inline-block;
  font-size:15px;
  color:rgba(244,239,230,.78);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.footer-link:hover{
  color:var(--cyan);
  border-bottom-color:rgba(63,224,200,.5);
}

.footer-meta{
  grid-column:1 / -1;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:12px 28px;
  margin-top:8px;
  padding-top:22px;
  border-top:1px dashed rgba(111,140,130,.38);
}
.footer-contact{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  line-height:1.7;
  color:rgba(244,239,230,.68);
  word-break:break-word;
}
.footer-note{
  font-size:13px;
  line-height:1.7;
  color:var(--smoke);
}

.footer-base{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  max-width:1200px;
  margin:clamp(28px,4vw,44px) auto 0;
  padding:18px clamp(20px,4vw,48px) 22px;
  border-top:1px solid rgba(111,140,130,.2);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--smoke);
}
.footer-copy{margin:0}
.footer-legal{margin:0;color:rgba(138,145,153,.86)}

/* ============================================================
   动效
   ============================================================ */
.reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(12px);
}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  :root{--rail-w:86px}
  body{font-size:16.5px}
  .brand-tag{display:none}
  .nav-label{font-size:12px}
  .rail-cta{width:42px;padding:16px 5px}
}

@media (max-width:900px){
  :root{--rail-w:0px;--topbar-h:64px}

  body{
    padding-left:0;
    padding-top:var(--topbar-h);
    font-size:16px;
  }

  .site-header{
    inset:0 0 auto 0;
    width:auto;
    height:var(--topbar-h);
    border-inline-end:0;
    border-bottom:1px solid var(--edge);
    background:var(--ink-green);
  }

  .rail-inner{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 16px;
    height:100%;
  }

  .brand{flex-direction:row;align-items:center;gap:10px;padding:0}
  .brand-text{flex-direction:row;align-items:baseline;gap:8px}
  .brand-name{writing-mode:horizontal-tb;font-size:15px;letter-spacing:.14em}
  .brand-tag{display:none}
  .brand-mark{font-size:14px;padding:5px 8px;border-radius:10px}

  .rail-ticks{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    inset:var(--topbar-h) 0 0 0;
    z-index:90;
    flex:none;
    align-items:stretch;
    justify-content:flex-start;
    padding:20px 18px 118px;
    background:linear-gradient(180deg,var(--ink-green) 0%,var(--char) 100%);
    border-top:1px solid var(--edge-soft);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity 180ms var(--ease),transform 180ms var(--ease),visibility 180ms linear;
  }
  .nav-list{align-items:stretch;gap:8px}
  .nav-item{justify-content:flex-start}
  .nav-link{
    flex-direction:row;
    align-items:baseline;
    justify-content:flex-start;
    gap:14px;
    width:100%;
    padding:15px 18px;
    border:1px solid rgba(111,140,130,.22);
    border-radius:18px;
    background:rgba(20,22,26,.55);
  }
  .nav-index{font-size:11px}
  .nav-label{writing-mode:horizontal-tb;font-size:16px;letter-spacing:.1em}

  .rail-cta{
    position:fixed;
    inset:auto 18px 20px 18px;
    width:auto;
    z-index:95;
    padding:16px 20px;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(12px);
    transition:opacity 180ms var(--ease),transform 180ms var(--ease),visibility 180ms linear;
  }
  .rail-cta-label{writing-mode:horizontal-tb;font-size:15px;letter-spacing:.12em}

  .site-header[data-open="true"] .site-nav{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-header[data-open="true"] .rail-cta{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-header[data-open="true"] .nav-toggle-box span:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .site-header[data-open="true"] .nav-toggle-box span:nth-child(2){opacity:0}
  .site-header[data-open="true"] .nav-toggle-box span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

  .grid-2,
  .grid-split,
  .grid-2-1,
  .grid-3-4{grid-template-columns:minmax(0,1fr)}

  .footer-inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-base{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .footer-cols{grid-template-columns:minmax(0,1fr);gap:24px}
  .tab-list{width:100%}
  .tab{flex:1 1 auto;text-align:center}
  .figure-cap{font-size:11px;padding:10px 14px}
}

/* ============================================================
   降低动效
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal-ready [data-reveal],
  [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .tab-panel[data-active="true"]{animation:none}
  .nav-link:hover,
  .rail-cta:hover,
  .btn:hover{transform:none}
}