/* =========================================================
   万能棋牌 · 全站共享样式 /assets/site.css
   夜桌墨绿体系 · 霓虹青强调 · 展览画册式节奏
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --ink-900:#06120F;
  --ink-800:#0B1F1A;
  --ink-700:#132C25;
  --cyan:#2FF0C8;
  --cyan-soft:#A6FBEA;
  --amber:#F2B23C;
  --violet:#9B6CFF;
  --violet-ink:#B79BFF;
  --paper:#EAF6F0;
  --muted:#8FB3A8;
  --label:#F0EAD6;
  --line:#1F4239;
  --warn:#FFD98A;

  --font-head:"Archivo Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --step-3:clamp(30px,4.4vw,58px);
  --step-2:clamp(22px,3vw,36px);
  --step-1:clamp(17px,1.8vw,23px);

  --wrap:1200px;
  --gutter:clamp(16px,4vw,32px);
  --gap:clamp(16px,2.4vw,28px);
  --dur:280ms;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 3. 基础与中文排版 ---------- */
html{scroll-behavior:smooth}
body{
  position:relative;
  min-height:100vh;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58% 44% at 10% 4%,rgba(47,240,200,.11),transparent 64%),
    radial-gradient(48% 38% at 92% 0%,rgba(155,108,255,.12),transparent 60%),
    radial-gradient(70% 46% at 50% 104%,rgba(242,178,60,.07),transparent 72%);
}
main{position:relative;z-index:1;display:block}
::selection{background:var(--cyan);color:#04120E}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

h1,h2,h3,h4,h5,h6{font-family:var(--font-head);line-height:1.14;font-weight:800;letter-spacing:.01em}
h1{font-size:var(--step-3)}
h2{font-size:var(--step-2)}
h3{font-size:var(--step-1);font-weight:700}
strong,b{font-weight:700;color:var(--paper)}

/* ---------- 4. 通用工具 ---------- */
.wrap{
  position:relative;
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.skip-link{
  position:absolute;
  left:12px;
  top:-72px;
  z-index:120;
  padding:10px 16px;
  background:var(--cyan);
  color:#04120E;
  font-weight:700;
  font-size:14px;
  transition:top 160ms ease-out;
}
.skip-link:focus{top:12px}

.mono,.eyebrow,.hint{font-family:var(--font-mono)}
.mono{font-size:12px;letter-spacing:.12em}
.muted{color:var(--muted)}
.eyebrow{
  margin:0;
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
  font-weight:500;
}
.lede{
  margin:0;
  font-size:17px;
  line-height:1.78;
  color:#CBE4DB;
  max-width:62ch;
}
.hint{margin:0;font-size:12px;letter-spacing:.12em;color:var(--muted)}
.prose{max-width:70ch;color:#D3E8E1}
.prose p{margin-bottom:.85em}
.prose p:last-child{margin-bottom:0}
.note{
  margin:0;
  padding:12px 16px;
  border-left:2px solid var(--amber);
  background:linear-gradient(90deg,rgba(242,178,60,.09),rgba(242,178,60,0));
  font-size:14px;
  line-height:1.7;
  color:#DCEFE7;
}
.rule{border:0;border-top:1px solid var(--line);margin:0}
.rule--dashed{border-top-style:dashed}
.stack > * + *{margin-top:clamp(10px,1.6vw,16px)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 5. 按钮与链接 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:1px;
  font-family:var(--font-head);
  font-size:15px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.2;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--cyan);color:#04120E;border-color:var(--cyan)}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:7px 14px;font-size:13px}
.ghost-link{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--cyan-soft);
  border-bottom:1px solid rgba(166,251,234,.35);
  padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.ghost-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(6,18,15,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  display:block;
  overflow:hidden;
  background:transparent;
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
}

.utility-bar{
  background:linear-gradient(90deg,rgba(11,31,26,.94),rgba(6,18,15,.7));
  border-bottom:1px solid var(--line);
}
.utility-bar__inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,24px);
  min-height:64px;
  padding-top:8px;
  padding-bottom:8px;
  transition:min-height var(--dur) var(--ease);
}
.utility-bar__actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--paper);
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:0 0 auto;
  border:1px solid var(--cyan);
  background:rgba(47,240,200,.08);
  color:var(--cyan);
  font-family:var(--font-head);
  font-weight:800;
  font-size:18px;
  line-height:1;
  transition:width var(--dur) var(--ease),height var(--dur) var(--ease),font-size var(--dur) var(--ease);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{
  font-family:var(--font-head);
  font-weight:800;
  font-size:17px;
  letter-spacing:.08em;
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--muted);
  text-transform:uppercase;
}
.brand--footer .brand__name{font-size:20px}

/* 版本标签 */
.version-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 11px;
  border:1px solid var(--line);
  background:var(--ink-700);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}
.version-badge__dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,240,200,.16);
}
.version-badge__num{color:var(--cyan);font-weight:700}
.version-badge__note{color:var(--muted)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 12px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:var(--cyan);
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle__text{line-height:1}

/* 主栏目导航 */
.site-nav{
  background:rgba(11,31,26,.55);
  border-top:1px solid var(--line);
}
.site-nav__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2vw,28px);
  min-height:52px;
  padding-top:6px;
  padding-bottom:6px;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(12px,2.4vw,30px);
  flex-wrap:wrap;
}
.site-nav__list a{
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.05em;
  color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-nav__list a:hover{color:var(--cyan)}
.site-nav__list a[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.site-nav__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--muted);
  white-space:nowrap;
}

/* 滚动收合态 */
.site-header[data-collapsed="true"] .utility-bar__inner{min-height:52px}
.site-header[data-collapsed="true"] .brand__mark{width:28px;height:28px;font-size:15px}
.site-header[data-collapsed="true"] .brand__tag,
.site-header[data-collapsed="true"] .version-badge__note{display:none}
.site-header[data-collapsed="true"] .site-nav__inner{min-height:44px}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,8vw,104px);
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900));
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(120px,1fr));
  gap:clamp(20px,3vw,44px);
  padding-top:clamp(36px,5vw,66px);
  padding-bottom:clamp(28px,4vw,52px);
}
.footer-brand__note{
  margin-top:16px;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
  max-width:34ch;
}
.footer-metrics{
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  margin-top:18px;
}
.footer-metrics__value{
  display:block;
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--amber);
  line-height:1.1;
}
.footer-metrics__label{
  display:block;
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{
  font-size:15px;
  color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

.footer-contact{
  border-top:1px solid var(--line);
  background:rgba(19,44,37,.45);
}
.footer-contact__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 34px;
  padding-top:18px;
  padding-bottom:18px;
}
.contact-list{
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
}
.contact-list__key{
  margin-right:8px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.contact-list__val{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--paper);
}
.footer-service{
  margin-left:auto;
  font-size:13px;
  color:var(--muted);
}
.footer-legal{border-top:1px solid var(--line)}
.footer-legal__inner{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 26px;
  padding-top:14px;
  padding-bottom:24px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}
.footer-legal__version{color:var(--cyan-soft)}

/* ---------- 8. 页面通用骨架 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:20px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--muted);transition:color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--cyan-soft)}

.page-head{padding:clamp(28px,5vw,64px) 0 clamp(18px,3vw,34px)}
.page-head__title{margin-top:14px}
.page-head__lede{margin-top:18px}

.section{padding:clamp(40px,6vw,86px) 0}
.section--tight{padding:clamp(22px,3vw,42px) 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 22px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,34px);
  border-bottom:1px solid var(--line);
}
.section-head__title{font-size:var(--step-2)}
.section-head__note{
  margin:0 0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

.grid{display:grid;gap:var(--gap)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--split-rev{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* ---------- 9. 卡片 / 标签 / 数据 ---------- */
.card{
  position:relative;
  padding:clamp(16px,2vw,24px);
  background:var(--ink-700);
  border:1px solid var(--line);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover{border-color:rgba(47,240,200,.45)}
.card--stack{box-shadow:-4px 4px 0 0 rgba(47,240,200,.14),-8px 8px 0 -2px rgba(11,31,26,.9)}
.card__label{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
}
.card__title{
  margin:10px 0 8px;
  font-family:var(--font-head);
  font-size:var(--step-1);
  font-weight:700;
  color:var(--paper);
}
.card__body{margin:0;font-size:15px;line-height:1.7;color:#C6DED6}
.card__meta{
  margin-top:14px;
  padding-top:12px;
  border-top:1px dashed var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid rgba(47,240,200,.4);
  background:rgba(47,240,200,.08);
  color:var(--cyan-soft);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  line-height:1.6;
}
.tag--amber{border-color:rgba(242,178,60,.45);background:rgba(242,178,60,.1);color:var(--amber)}
.tag--violet{border-color:rgba(155,108,255,.5);background:rgba(155,108,255,.14);color:var(--violet-ink)}
.tag--paper{border-color:#CFC6AB;background:var(--label);color:#0B1F1A}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(26px,3.4vw,42px);
  letter-spacing:.04em;
  line-height:1;
  color:var(--amber);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.stat--cyan .stat__value{color:var(--cyan)}
.stat--violet .stat__value{color:var(--violet-ink)}

/* ---------- 10. 横向资料带 ---------- */
.band{
  padding:16px 0;
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.band__scroller{
  display:flex;
  gap:14px;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  scroll-snap-type:x proximity;
  padding:6px var(--gutter) 16px;
  scrollbar-width:thin;
  scrollbar-color:var(--cyan) var(--ink-700);
}
.band__scroller::-webkit-scrollbar{height:6px}
.band__scroller::-webkit-scrollbar-track{background:var(--ink-700)}
.band__scroller::-webkit-scrollbar-thumb{background:var(--cyan)}
.band__item{
  flex:0 0 clamp(220px,26vw,300px);
  scroll-snap-align:start;
  padding:14px 16px;
  background:var(--ink-700);
  border:1px solid var(--line);
}
.band__item--accent{
  border-color:rgba(47,240,200,.5);
  background:linear-gradient(160deg,rgba(47,240,200,.12),rgba(19,44,37,.92));
}

/* ---------- 11. 折叠面板 ---------- */
.panel{
  margin-bottom:10px;
  background:var(--ink-700);
  border:1px solid var(--line);
}
.panel__summary{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 18px;
  font-family:var(--font-head);
  font-size:17px;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  list-style:none;
}
.panel__summary::-webkit-details-marker{display:none}
.panel__summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:18px;
  color:var(--cyan);
}
.panel[open] .panel__summary{border-bottom:1px solid var(--line)}
.panel[open] .panel__summary::after{content:"–"}
.panel__body{
  padding:14px 18px 18px;
  font-size:15px;
  line-height:1.75;
  color:#C6DED6;
}

/* ---------- 12. 图片容器（页面阶段放置占位） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-700);
  border:1px solid var(--line);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--skew{clip-path:polygon(0 0,100% 0,100% 90%,0 100%)}
.media--texture{
  background-image:
    repeating-linear-gradient(135deg,rgba(47,240,200,.09) 0 2px,transparent 2px 11px),
    linear-gradient(160deg,var(--ink-700),var(--ink-800));
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:10px 12px;
  background:linear-gradient(0deg,rgba(6,18,15,.94),rgba(6,18,15,0));
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--cyan-soft);
}

/* ---------- 13. 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:32px}
  .footer-col:last-of-type{grid-column:2 / span 2}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .utility-bar__inner{flex-wrap:wrap;row-gap:8px;padding-top:10px;padding-bottom:10px}
  .brand{flex:1 1 55%}
  .utility-bar__actions{order:3;margin-left:0}
  .version-badge{order:4;flex:1 1 100%;justify-content:flex-start}
  .nav-toggle{order:2;margin-left:auto}
  .site-nav{display:none}
  .site-nav[data-open="true"]{display:block}
  .site-nav__inner{
    flex-direction:column;
    align-items:stretch;
    min-height:0;
    padding-top:6px;
    padding-bottom:18px;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__list li{border-bottom:1px solid var(--line)}
  .site-nav__list a{display:block;width:100%;padding:13px 2px;font-size:16px}
  .site-nav__meta{display:none}
  .grid--split,.grid--split-rev,.grid--12{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-col:last-of-type{grid-column:auto}
  .footer-service{margin-left:0;flex:1 1 100%}
}
@media (max-width:560px){
  .utility-bar__actions .ghost-link{display:none}
  .version-badge{font-size:11px;letter-spacing:.08em}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-legal__inner{flex-direction:column;gap:6px}
  .contact-list{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none;transition:none}
  .btn--primary:hover{transform:none}
}