/* =========================================================
   万能棋牌 · 共享样式 /assets/site.css
   近单色体系：深墨绿 + 暖木 + 单一琥珀金
   ========================================================= */

:root{
  --ink-green:#0B2119;
  --green-panel:#123529;
  --green-line:rgba(181,136,90,.30);
  --green-line-soft:rgba(181,136,90,.15);
  --wood:#6B4A2E;
  --wood-light:#B5885A;
  --amber:#D9A64B;
  --amber-deep:#B9873A;
  --steel:#8AA0B4;
  --steel-deep:#5F7488;
  --ivory:#F1EBDF;
  --paper:#FBFAF7;
  --ink:#12140F;
  --ink-soft:#3A3D34;
  --rule:#C6BEB0;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Consolas,monospace;

  --shell:1240px;
  --gap:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:118px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,picture{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
main{display:block}
#main-content{scroll-margin-top:118px}

/* ---------- 中文排版基础 ---------- */
body{
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.3;
  letter-spacing:.01em;
  color:var(--ink);
  text-wrap:balance;
}
h1{font-size:clamp(30px,5vw,44px)}
h2{font-size:clamp(24px,3.4vw,32px)}
h3{font-size:clamp(20px,2.4vw,24px)}
h4{font-size:19px}
p{text-wrap:pretty}
.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  font-weight:400;
}
.meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel-deep);
}
strong,b{font-weight:700}
::selection{background:var(--amber);color:var(--ink-green)}

/* ---------- 无障碍 ---------- */
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.skip-link{
  position:fixed;
  left:12px;
  top:-80px;
  z-index:200;
  padding:10px 16px;
  background:var(--amber);
  color:var(--ink-green);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* =========================================================
   页头：细线框架 + 深墨绿底
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--ink-green);
  border-bottom:1px solid var(--wood);
  padding:12px 0 0;
}
.site-header__frame{
  width:min(100% - 24px,1380px);
  margin:0 auto 12px;
  display:flex;
  align-items:center;
  gap:20px;
  padding:10px 16px;
  min-height:66px;
  border:1px solid var(--green-line);
  background:linear-gradient(180deg,rgba(18,53,41,.9),rgba(11,33,25,.9));
}

/* 品牌 */
.site-header__brand{flex:0 0 auto}
.brand{display:inline-flex;align-items:center;gap:12px}
.brand__mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  width:38px;
  height:38px;
  border:1px solid var(--wood-light);
  color:var(--amber);
  font-family:var(--font-display);
  font-size:19px;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ivory);
}
.brand__tagline{
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--wood-light);
}

/* 导航 */
.site-nav{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-width:0;
}
.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-block;
  padding:8px 10px 6px;
  font-size:15px;
  line-height:1.4;
  color:rgba(241,235,223,.82);
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--ivory);border-bottom-color:var(--wood-light)}
.site-nav__link[aria-current="page"]{
  color:var(--amber);
  border-bottom-color:var(--amber);
}
.site-nav__utility{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.util-link{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border:1px solid var(--green-line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(241,235,223,.82);
  white-space:nowrap;
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease);
}
.util-link:hover,
.util-link:focus-visible{border-color:var(--wood-light);color:var(--ivory)}
.util-link--search::before{
  content:"⌕";
  margin-right:7px;
  font-size:14px;
  line-height:1;
  color:var(--steel);
}
.util-link--cta{border-color:var(--amber);color:var(--amber)}
.util-link--cta:hover,
.util-link--cta:focus-visible{background:var(--amber);color:var(--ink-green)}

/* 移动端按钮 */
.nav-toggle{display:none}

/* 滚动进度 */
.scroll-progress{
  height:2px;
  background:rgba(107,74,46,.42);
  overflow:hidden;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  margin-top:72px;
  background:var(--ink-green);
  color:rgba(241,235,223,.86);
  border-top:1px solid var(--wood);
}
.site-footer__frame{
  width:min(100% - 32px,var(--shell));
  margin-inline:auto;
  padding:56px 0 24px;
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1fr 1.3fr 1.45fr 1fr;
  gap:36px 32px;
}
.footer-col{min-width:0}
.footer-col__title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--green-line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--wood-light);
}
.footer-col--brand .footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:12px;
  font-family:var(--font-display);
  font-size:23px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--ivory);
}
.footer-brand__mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border:1px solid var(--wood);
  color:var(--amber);
  font-size:17px;
  line-height:1;
}
.footer-note{
  font-size:14px;
  line-height:1.8;
  color:rgba(241,235,223,.62);
}
.footer-note + .footer-note{margin-top:8px}
.footer-note--small{margin-top:12px;font-size:12px;line-height:1.7;color:rgba(241,235,223,.5)}

.footer-nav{display:flex;flex-direction:column;gap:2px}
.footer-nav__link{
  position:relative;
  display:inline-block;
  padding:3px 0;
  font-size:14px;
  color:rgba(241,235,223,.82);
  transition:color .22s var(--ease);
}
.footer-nav__link::after,
.footer-legal__link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:1px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .26s var(--ease);
}
.footer-nav__link:hover,
.footer-nav__link:focus-visible,
.footer-legal__link:hover,
.footer-legal__link:focus-visible{color:var(--amber)}
.footer-nav__link:hover::after,
.footer-nav__link:focus-visible::after,
.footer-legal__link:hover::after,
.footer-legal__link:focus-visible::after{transform:scaleX(1)}

.footer-legal{display:flex;flex-direction:column;gap:2px}
.footer-legal__link{
  position:relative;
  display:inline-block;
  padding:3px 0;
  font-size:14px;
  color:rgba(241,235,223,.82);
  transition:color .22s var(--ease);
}

.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__item{display:flex;flex-direction:column;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--steel);
}
.footer-contact__value{
  font-size:14px;
  line-height:1.7;
  color:rgba(241,235,223,.9);
  overflow-wrap:anywhere;
}
.footer-contact__value.mono{font-size:13px;color:var(--ivory)}

.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 20px;
  margin-top:40px;
  padding-top:18px;
  border-top:1px solid var(--green-line);
  font-size:12px;
  color:rgba(241,235,223,.55);
}
.footer-icp,.footer-meta{font-size:12px;color:rgba(241,235,223,.55)}

/* =========================================================
   页面骨架
   ========================================================= */
.shell{
  width:min(100% - 32px,var(--shell));
  margin-inline:auto;
}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.col-3,.col-4,.col-6,.col-8,.col-12,.col-index,.col-main,.col-note{grid-column:1 / -1;min-width:0}

.section{padding-block:52px}
.section--dark{background:var(--ink-green);color:rgba(241,235,223,.86)}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:var(--ivory)}
.section--dark .rule{background:var(--green-line)}
.section--paper{background:var(--paper)}
.section--ivory{background:var(--ivory)}

.eyebrow{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--wood);
}
.section--dark .eyebrow{color:var(--wood-light)}
.rule{
  height:1px;
  border:0;
  background:var(--rule);
  margin-block:28px;
}
.rule--wood{background:var(--wood)}
.lede{
  font-size:19px;
  line-height:1.8;
  color:var(--ink-soft);
  max-width:62ch;
}
.section--dark .lede{color:rgba(241,235,223,.78)}

.prose{max-width:66ch}
.prose h2{margin-top:1.6em;margin-bottom:.55em}
.prose h3{margin-top:1.35em;margin-bottom:.5em}
.prose h4{margin-top:1.2em;margin-bottom:.4em}
.prose p + p{margin-top:1.05em}
.prose ul,.prose ol{margin:1em 0}
.prose li{position:relative;padding-left:20px;margin-bottom:.5em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:9px;
  height:1px;
  background:var(--wood-light);
}
.prose a{color:var(--ink);border-bottom:1px solid var(--amber)}
.prose a:hover{color:var(--amber-deep)}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid var(--wood);
  background:transparent;
  color:var(--ink-green);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  transition:background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--ink-green);
  font-weight:700;
}
.btn--primary:hover{background:var(--amber-deep);border-color:var(--amber-deep)}
.btn--ghost:hover{border-color:var(--wood-light);background:rgba(107,74,46,.08)}
.btn--onDark{border-color:var(--green-line);color:var(--ivory)}
.btn--onDark:hover{border-color:var(--amber);color:var(--amber)}

/* 面包屑 */
.breadcrumbs{
  padding-top:22px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel-deep);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:flex;align-items:center}
.breadcrumbs li + li::before{content:"/";margin-right:8px;color:var(--rule)}
.breadcrumbs a{color:var(--steel-deep);border-bottom:1px solid transparent}
.breadcrumbs a:hover,.breadcrumbs a:focus-visible{color:var(--amber-deep);border-bottom-color:var(--amber)}
.breadcrumbs [aria-current="page"]{color:var(--ink);font-weight:500}

/* 卡片 */
.card{
  display:block;
  padding:22px;
  background:var(--paper);
  border:1px solid var(--rule);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
a.card:hover,
a.card:focus-visible{border-color:var(--wood-light);transform:translateY(-1px)}
.card--dark{
  background:var(--green-panel);
  border-color:var(--wood);
  color:rgba(241,235,223,.86);
}
.card--dark h3,.card--dark h4{color:var(--ivory)}
.card__meta{margin-bottom:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--steel-deep)}
.card--dark .card__meta{color:var(--steel)}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  padding:2px 9px;
  border:1px solid var(--rule);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel-deep);
  white-space:nowrap;
}
.tag--amber{border-color:var(--amber);color:var(--amber-deep)}
.tag--wood{border-color:var(--wood);color:var(--wood)}

/* 图片容器：直角裁切 + 内阴影压暗边缘 */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:16 / 10;
  background:var(--green-panel);
  border:1px solid var(--wood);
}
.media img,
.media picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  box-shadow:
    inset 0 0 0 1px rgba(11,33,25,.4),
    inset 0 -70px 90px -50px rgba(11,33,25,.8);
}
.media--square{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:3 / 4}
.media--wide{aspect-ratio:21 / 9}
.media--thumb{aspect-ratio:4 / 3}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel-deep);
}
.media__tag{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:2;
  padding:3px 9px;
  background:rgba(11,33,25,.82);
  border:1px solid var(--green-line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--amber);
}
.media__placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  height:100%;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(181,136,90,.7);
  background:
    linear-gradient(135deg,rgba(181,136,90,.08) 0 1px,transparent 1px 100%),
    linear-gradient(180deg,var(--green-panel),var(--ink-green));
  background-size:14px 14px,auto;
}

/* 竖向索引脊 */
.index-nav{
  border-top:1px solid var(--rule);
  padding-top:14px;
}
.index-nav__title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--wood);
}
.index-nav__list{
  margin-top:10px;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.index-nav__link{
  display:block;
  padding:8px 10px 8px 14px;
  border-left:2px solid transparent;
  font-size:14px;
  line-height:1.6;
  color:var(--ink);
  transition:background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.index-nav__link:hover,
.index-nav__link:focus-visible{background:rgba(107,74,46,.07);border-left-color:var(--wood-light)}
.index-nav__link[aria-current="true"]{
  border-left-color:var(--amber);
  background:rgba(217,166,75,.12);
  color:var(--ink-green);
  font-weight:500;
}

/* =========================================================
   响应式
   ========================================================= */
@media (min-width:900px){
  .col-index{grid-column:span 3}
  .col-main{grid-column:span 7}
  .col-note{grid-column:span 2}
  .col-4{grid-column:span 4}
  .col-6{grid-column:span 6}
  .col-8{grid-column:span 8}
}

@media (min-width:961px){
  .index-nav{position:sticky;top:118px}
}

@media (max-width:1100px){
  .site-nav__link{padding:8px 8px 6px;font-size:14px}
  .site-header__frame{gap:14px;padding:10px 12px}
}

@media (max-width:960px){
  html{scroll-padding-top:132px}
  #main-content{scroll-margin-top:132px}

  .site-header{padding-top:10px}
  .site-header__frame{
    flex-wrap:wrap;
    gap:12px;
    padding:12px 14px;
  }
  .site-header__brand{flex:0 0 auto}
  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:10px;
    margin-left:auto;
    padding:10px 12px;
    border:1px solid var(--green-line);
    color:var(--ivory);
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:.08em;
  }
  .nav-toggle__bars{
    position:relative;
    display:block;
    width:16px;
    height:1px;
    background:currentColor;
  }
  .nav-toggle__bars::before,
  .nav-toggle__bars::after{
    content:"";
    position:absolute;
    left:0;
    width:16px;
    height:1px;
    background:currentColor;
    transition:transform .24s var(--ease),top .24s var(--ease);
  }
  .nav-toggle__bars::before{top:-5px}
  .nav-toggle__bars::after{top:5px}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}

  .site-nav{
    flex:1 0 100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:0;
    overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .site-nav[data-open="true"]{max-height:680px}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-top:14px;
    padding-top:6px;
    border-top:1px solid var(--green-line);
  }
  .site-nav__item{width:100%}
  .site-nav__link{
    display:block;
    width:100%;
    padding:12px 4px 12px 12px;
    font-size:15px;
    border-bottom:1px solid var(--green-line-soft);
    border-left:2px solid transparent;
  }
  .site-nav__link:hover,
  .site-nav__link:focus-visible{border-bottom-color:var(--green-line-soft);border-left-color:var(--wood-light)}
  .site-nav__link[aria-current="page"]{
    border-bottom-color:var(--green-line-soft);
    border-left-color:var(--amber);
    background:rgba(217,166,75,.08);
  }
  .site-nav__utility{
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    margin:14px 0 16px;
  }
  .util-link{justify-content:center;padding:11px 12px}

  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 24px}
  .footer-col--brand{grid-column:1 / -1}
  .site-footer__frame{padding:44px 0 22px}
  .section{padding-block:40px}
}

@media (max-width:600px){
  .site-header__frame{width:calc(100% - 16px)}
  .site-footer__frame{width:calc(100% - 28px)}
  .shell{width:calc(100% - 28px)}
  .site-footer__grid{grid-template-columns:1fr}
  .brand__tagline{letter-spacing:.1em}
  .lede{font-size:17px}
  .card{padding:18px}
  .site-footer__base{flex-direction:column;gap:6px}
}

@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;
  }
}