/* ==========================================================================
   麻将胡了试玩 · 共享站点样式 /assets/site.css
   母题：牌面（刻痕 / 圆点 / 玉绿朱红） + 时间轴（刻度 / 班次 / 等宽数字）
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 变量 ---------- */
:root{
  --paper:#F4EDE1;
  --paper-lift:#FBF7F0;
  --jade:#1F7A63;
  --jade-deep:#0E4A3C;
  --vermillion:#C8322B;
  --vermillion-deep:#A6271F;
  --gold:#C9A227;
  --ink:#101A33;
  --ink-brown:#241A14;
  --night:#0B1220;
  --sand:#D9CFBE;
  --mist:#7FA89B;
  --neon:#E8556D;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --maxw:1280px;
  --gutter:clamp(18px,4vw,40px);
  --header-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --hair:1px solid rgba(201,162,39,.5);
}

/* ---------- 3. 基础中文排版 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-underline-offset:3px;
}
h1,h2,h3,h4{font-weight:900;letter-spacing:-.01em;line-height:1.22;color:var(--ink-brown)}
h1{font-size:clamp(34px,4.6vw,52px)}
h2{font-size:clamp(25px,3.1vw,32px)}
h3{font-size:clamp(19px,2vw,21px)}
p{max-width:36em}
strong{font-weight:800;color:var(--ink-brown)}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em}

:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

/* ---------- 4. 布局骨架 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
#main-content{padding-top:var(--header-h)}
#main-content > [data-hero-overlay]:first-child{margin-top:calc(var(--header-h) * -1)}

.section{padding:clamp(54px,7vw,96px) 0}
.section--tight{padding:clamp(32px,4vw,54px) 0}
.section--dark{background:var(--night);color:var(--paper);border-block:1px solid rgba(201,162,39,.35)}
.section--ink{background:var(--ink);color:var(--paper)}
.section--dark h2,.section--dark h3,.section--ink h2,.section--ink h3{color:var(--paper)}
.section--dark p,.section--ink p{color:rgba(244,237,225,.82)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(18px,2.4vw,28px)}
.col-3{grid-column-end:span 3}
.col-4{grid-column-end:span 4}
.col-5{grid-column-end:span 5}
.col-6{grid-column-end:span 6}
.col-7{grid-column-end:span 7}
.col-8{grid-column-end:span 8}
.col-9{grid-column-end:span 9}
.col-10{grid-column-end:span 10}
.col-12{grid-column-end:span 12}
.offset-1{grid-column-start:2}
.offset-2{grid-column-start:3}

/* ---------- 5. 通用排版组件 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:13px;font-weight:500;
  letter-spacing:.22em;color:var(--vermillion);margin:0 0 12px;
}
.kicker::before{content:"";width:26px;height:2px;background:var(--vermillion);flex:0 0 auto}
.section--dark .kicker,.section--ink .kicker{color:var(--gold)}
.section--dark .kicker::before,.section--ink .kicker::before{background:var(--gold)}

.section-title{position:relative;padding-left:14px}
.section-title::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;background:var(--jade)}
.section--dark .section-title::before,.section--ink .section-title::before{background:var(--gold)}

.section-head{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);
  gap:clamp(18px,3vw,44px);align-items:end;margin-bottom:clamp(24px,3vw,40px);
}
.section-head__main{display:flex;flex-direction:column;gap:10px}
.section-head__aside{margin:0}

.lede{font-size:17px;line-height:1.78;max-width:34em;color:rgba(16,26,51,.78)}
.section--dark .lede,.section--ink .lede{color:rgba(244,237,225,.8)}

.note{
  font-size:13.5px;line-height:1.7;color:rgba(16,26,51,.6);
  border-top:1px solid var(--sand);padding-top:10px;max-width:30em;
}
.note--mono{font-family:var(--font-mono);letter-spacing:.02em}
.section--dark .note,.section--ink .note{color:rgba(244,237,225,.6);border-top-color:rgba(201,162,39,.35)}

.rule-h{height:1px;border:0;background:var(--gold);opacity:.5;margin:0}

.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;
  border:1px solid rgba(31,122,99,.35);background:rgba(31,122,99,.07);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;
  color:var(--jade-deep);white-space:nowrap;
}
.tag--accent{border-color:rgba(200,50,43,.45);background:rgba(200,50,43,.07);color:var(--vermillion)}
.tag--gold{border-color:rgba(201,162,39,.6);background:rgba(201,162,39,.12);color:#7d6412}
.section--dark .tag,.section--ink .tag{color:var(--paper);border-color:rgba(201,162,39,.5);background:rgba(201,162,39,.12)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid transparent;border-radius:0;
  background:var(--jade);color:var(--paper);
  font-family:var(--font-sans);font-size:15px;font-weight:700;letter-spacing:.06em;
  cursor:pointer;text-align:center;
  transition:background-color 160ms var(--ease),color 160ms var(--ease),border-color 160ms var(--ease);
}
.btn:hover{background:var(--jade-deep)}
.btn--accent{background:var(--vermillion);color:var(--paper)}
.btn--accent:hover{background:var(--vermillion-deep)}
.btn--jade{background:var(--jade);color:var(--paper)}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(36,26,20,.35)}
.btn--ghost:hover{background:transparent;border-color:var(--vermillion);color:var(--vermillion)}
.section--dark .btn--ghost,.section--ink .btn--ghost,.site-footer .btn--ghost{
  color:var(--paper);border-color:rgba(244,237,225,.42);
}
.section--dark .btn--ghost:hover,.section--ink .btn--ghost:hover{color:var(--gold);border-color:var(--gold)}
.btn--sm{padding:8px 14px;font-size:13.5px;letter-spacing:.04em}

/* ---------- 7. 数据面板 / 卡片 ---------- */
.panel{background:var(--paper-lift);border:1px solid var(--sand);padding:clamp(18px,2.4vw,28px)}
.panel--dark{background:var(--night);border-color:rgba(201,162,39,.35);color:var(--paper)}
.panel--dark h3,.panel--dark p{color:var(--paper)}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;
  border-bottom:1px solid rgba(201,162,39,.45);padding-bottom:12px;margin-bottom:16px;
}
.panel__title{font-size:19px;font-weight:800;letter-spacing:.01em;color:inherit}

.stat{display:flex;flex-direction:column;gap:6px;border-left:3px solid var(--jade);padding-left:14px}
.stat--accent{border-left-color:var(--vermillion)}
.stat__num{
  font-family:var(--font-mono);font-weight:500;letter-spacing:.02em;line-height:1.1;
  font-size:clamp(27px,3.4vw,38px);color:var(--jade-deep);
}
.stat--accent .stat__num{color:var(--vermillion)}
.stat__label{font-size:13.5px;letter-spacing:.08em;color:var(--mist)}
.section--dark .stat__num,.section--ink .stat__num{color:var(--gold)}
.section--dark .stat__label,.section--ink .stat__label{color:rgba(244,237,225,.62)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{margin:0 0 22px}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;color:var(--mist);
}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--mist);border-bottom:1px solid transparent;transition:color 160ms var(--ease),border-color 160ms var(--ease)}
.breadcrumb__link:hover,.breadcrumb__link:focus-visible{color:var(--vermillion);border-bottom-color:var(--vermillion)}
.breadcrumb__link[aria-current="page"]{color:var(--ink-brown);border-bottom-color:var(--sand)}
.breadcrumb__sep{color:rgba(127,168,155,.75)}
.section--dark .breadcrumb__list,.section--ink .breadcrumb__list{color:rgba(244,237,225,.6)}
.section--dark .breadcrumb__link,.section--ink .breadcrumb__link{color:rgba(244,237,225,.72)}

/* ---------- 9. 图片容器（页面阶段放图） ---------- */
.media{margin:0;display:block}
.media__frame{
  position:relative;overflow:hidden;background:var(--night);
  border:1px solid var(--sand);width:100%;
}
.media__frame--empty{
  background-image:repeating-linear-gradient(135deg,rgba(31,122,99,.55) 0 14px,rgba(11,18,32,.95) 14px 28px);
}
.media__img{width:100%;height:100%;object-fit:cover;display:block}
.media__cap{
  margin-top:10px;font-family:var(--font-mono);font-size:13px;line-height:1.6;
  letter-spacing:.02em;color:var(--mist);
}
.media--tile .media__frame{aspect-ratio:3/4}
.media--wide .media__frame{aspect-ratio:16/9}
.media--micro .media__frame{aspect-ratio:1/1}
.media--band .media__frame{aspect-ratio:21/9}

/* ---------- 10. 装饰：牌面圆点 ---------- */
.tile-chip{display:inline-flex;align-items:center;gap:5px}
.tile-chip i{width:9px;height:9px;display:block;border:1px solid rgba(201,162,39,.7);background:var(--jade)}
.tile-chip i:nth-child(2){background:var(--vermillion)}
.tile-chip i:nth-child(3){background:var(--gold)}
.tile-chip--sm i{width:7px;height:7px}

/* ---------- 11. 显示动效协议 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity 480ms var(--ease),transform 480ms var(--ease)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 12. 页头 ---------- */
.u-sr-only{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:220;
  background:var(--ink);color:var(--paper);padding:10px 16px;
  font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:top 160ms var(--ease);
}
.skip-link:focus{top:10px;color:var(--paper)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:var(--paper);color:var(--ink);
  border-bottom:1px solid rgba(201,162,39,.55);
  transition:background-color 240ms var(--ease),color 240ms var(--ease),border-color 240ms var(--ease);
}
.site-header.is-overlay{background:transparent;color:var(--paper);border-bottom-color:transparent}
.site-header.is-overlay .brand{color:var(--paper)}
.site-header.is-overlay .nav__link{color:var(--paper)}
.site-header.is-overlay .nav__link[aria-current="page"]{color:var(--gold)}

.site-header__inner{display:flex;align-items:center;gap:clamp(14px,2vw,28px);min-height:var(--header-h)}

.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink);flex:0 0 auto;transition:color 240ms var(--ease)}
.brand__mark{
  position:relative;width:34px;height:34px;flex:0 0 auto;
  background:var(--jade);border:1px solid var(--gold);
  display:grid;place-items:center;
}
.brand__mark::before{content:"";position:absolute;inset:5px;border:1px solid rgba(244,237,225,.45)}
.brand__pip{width:9px;height:9px;background:var(--vermillion);transform:rotate(45deg)}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{font-size:19px;font-weight:900;letter-spacing:-.01em;color:inherit}
.brand__sub{font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.28em;opacity:.62;margin-top:3px}

.nav{flex:1 1 auto;display:flex;align-items:center;justify-content:center}
.nav__list{display:flex;align-items:center;gap:clamp(8px,1.6vw,26px);margin:0;padding:0}
.nav__item{list-style:none}
.nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:10px 2px;font-size:15px;font-weight:600;letter-spacing:.04em;
  color:var(--ink);transition:color 200ms var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--gold);
  transform:scaleX(0);transform-origin:left center;
  transition:transform 200ms var(--ease);
}
.nav__link:hover::after,.nav__link:focus-visible::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--jade)}
.nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav__num,.nav__eyebrow,.nav__meta,.nav__cta{display:none}

.header-cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 auto;
  background:var(--jade);border:1px solid var(--gold);cursor:pointer;
  transition:background-color 160ms var(--ease);
}
.nav-toggle:hover{background:var(--jade-deep)}
.nav-toggle[aria-expanded="true"]{background:var(--vermillion)}
.nav-toggle__bars{position:relative;width:18px;height:12px;display:block}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--paper);
  transition:transform 200ms var(--ease),top 200ms var(--ease),opacity 200ms var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}

.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:transparent;pointer-events:none;
}
.scroll-meter__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--jade) 0%,var(--gold) 55%,var(--vermillion) 100%);
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  background:var(--ink);color:rgba(244,237,225,.82);
  border-top:1px solid var(--gold);
  padding:clamp(44px,5vw,64px) 0 26px;
  font-size:15px;
}
.site-footer__inner{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.4fr;
  gap:clamp(24px,4vw,56px);
}
.site-footer__col{min-width:0}
.site-footer__col--brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.brand--footer{color:var(--paper)}
.brand--footer .brand__mark{background:var(--jade-deep)}
.site-footer__lede{
  font-size:14.5px;line-height:1.7;color:rgba(244,237,225,.74);
  max-width:24em;border-left:2px solid var(--gold);padding-left:12px;
}
.site-footer__title{
  font-size:12.5px;font-weight:700;letter-spacing:.24em;color:var(--gold);
  margin:0 0 16px;line-height:1.4;
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{
  color:rgba(244,237,225,.82);border-bottom:1px solid transparent;
  transition:color 160ms var(--ease),border-color 160ms var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--paper);border-bottom-color:var(--gold)}
.footer-list--plain li{
  color:rgba(244,237,225,.68);font-size:13.5px;line-height:1.6;letter-spacing:.02em;
  word-break:break-word;
}
.site-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;
  margin-top:clamp(30px,4vw,46px);padding-top:20px;
  border-top:1px solid rgba(201,162,39,.3);
}
.site-footer__copy{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:rgba(244,237,225,.6);margin:0}
.site-footer__legal{display:flex;flex-wrap:wrap;gap:18px;margin-inline-start:auto}
.site-footer__legal a{
  font-size:13px;color:rgba(244,237,225,.72);
  border-bottom:1px solid transparent;
  transition:color 160ms var(--ease),border-color 160ms var(--ease);
}
.site-footer__legal a:hover,.site-footer__legal a:focus-visible{color:var(--gold);border-bottom-color:var(--gold)}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1100px){
  .nav__link{font-size:14px;letter-spacing:.02em}
  .nav__list{gap:clamp(6px,1.1vw,16px)}
  .site-footer__inner{grid-template-columns:1.4fr 1fr 1fr}
  .site-footer__col--brand{grid-column:span 3}
}

@media (max-width:980px){
  :root{--header-h:66px}
  body{font-size:16px}

  .header-cta{display:none}
  .nav-toggle{display:inline-flex}

  .nav{
    position:fixed;inset:0;z-index:130;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;
    background:var(--night);color:var(--paper);
    padding:calc(var(--header-h) + 30px) var(--gutter) 40px;
    overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms linear;
  }
  .nav[data-open]{opacity:1;visibility:visible;transform:none}

  .nav__eyebrow{
    display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;
    color:var(--gold);margin:0 0 20px;padding-bottom:12px;
    border-bottom:1px solid rgba(201,162,39,.4);
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav__item{border-bottom:1px solid rgba(201,162,39,.22)}
  .nav__link{
    display:flex;width:100%;padding:16px 4px;
    font-size:19px;font-weight:800;letter-spacing:.02em;
    color:var(--paper);justify-content:flex-start;
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--gold)}
  .nav__num{
    display:inline-block;font-family:var(--font-mono);font-size:12.5px;font-weight:500;
    letter-spacing:.1em;color:rgba(201,162,39,.75);margin-right:14px;
  }
  .nav__meta{
    display:block;margin:22px 0 0;font-family:var(--font-mono);
    font-size:12.5px;letter-spacing:.04em;color:rgba(244,237,225,.6);
  }
  .nav__cta{display:inline-flex;margin-top:26px;align-self:flex-start}

  html.is-nav-open,html.is-nav-open body{overflow:hidden}
  html.is-nav-open .site-header{
    z-index:160;background:transparent;color:var(--paper);border-bottom-color:transparent;
  }
  html.is-nav-open .site-header .brand{color:var(--paper)}

  .section-head{grid-template-columns:1fr;align-items:start}
  .grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-12{grid-column-end:span 6}
  .offset-1,.offset-2{grid-column-start:auto}
}

@media (max-width:760px){
  .site-footer__inner{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer__col--brand{grid-column:span 2}
  .site-footer__legal{margin-inline-start:0}
}

@media (max-width:560px){
  .site-footer__inner{grid-template-columns:1fr}
  .site-footer__col--brand{grid-column:span 1}
  .grid{grid-template-columns:1fr;gap:18px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-12{grid-column-end:span 1}
  .brand__name{font-size:17px}
}

/* ---------- 15. 降级动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .scroll-meter__fill{transition:none}
}