/* ==========================================================
   /assets/site.css — 梦想棋牌主站 共享样式
   夜空深蓝底 · 经幡色标 · 直角细线 · 海报式分层
   ========================================================== */

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

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0B1B33;
  --ink-2:#12294A;
  --cream:#F3E9D6;
  --paper:#FBF6EC;
  --flag-blue:#2F6FD0;
  --flag-white:#FFFFFF;
  --flag-red:#C8362B;
  --flag-green:#2E7D53;
  --flag-yellow:#E3A008;
  --brown:#241C16;
  --haze:#8A99AD;
  --rule:rgba(255,255,255,.16);
  --rule-strong:rgba(255,255,255,.34);

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

  --maxw:1280px;
  --header-h:76px;
  --rail-w:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  color:var(--flag-white);
  background:var(--ink);
  min-height:100%;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.075) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.75;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.15;
  margin:0 0 .6em;
}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.7rem,3.3vw,2.5rem)}
h3{font-size:clamp(1.2rem,2vw,1.55rem)}
h4{font-size:1.05rem;letter-spacing:0}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
strong{font-weight:700}
::selection{background:var(--flag-red);color:#fff}
:focus-visible{outline:2px solid var(--flag-yellow);outline-offset:3px}

.site-main{position:relative;z-index:1}

/* ---------- 4. 布局工具 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{position:relative;padding:72px 0}
.section--ink{background:var(--ink);color:var(--flag-white)}
.section--deep{background:var(--ink-2);color:var(--flag-white)}
.section--paper{background:var(--cream);color:var(--brown);--rule:rgba(36,28,22,.16);--rule-strong:rgba(36,28,22,.34);--haze:#6E7A8C}
.section--card{background:var(--paper);color:var(--brown);--rule:rgba(36,28,22,.12);--rule-strong:rgba(36,28,22,.3);--haze:#6E7A8C}
.page-head{padding:calc(var(--header-h) + 64px) 0 40px}
.rule{border:0;border-top:1px solid var(--rule);margin:36px 0}
.measure{max-width:34em}
.prose{max-width:38em}
.prose p{max-width:34em;margin-bottom:1.15em}
.prose h2,.prose h3{margin-top:1.5em}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose code{font-family:var(--font-mono);font-size:.92em;background:rgba(255,255,255,.08);padding:1px 5px}
.section--paper .prose code,.section--card .prose code{background:rgba(36,28,22,.08)}

.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
@media (max-width:900px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));gap:20px}
}
@media (max-width:760px){
  .grid--12 > *{grid-column:1 / -1}
  .section{padding:56px 0}
  .page-head{padding:calc(var(--header-h) + 40px) 0 28px}
}

/* ---------- 5. 索引文字 ---------- */
.eyebrow,.label-mono{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.5;
  color:var(--haze);
}
.eyebrow{margin-bottom:14px}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid currentColor;
  transition:color .2s var(--ease),gap .2s var(--ease);
}
.link-more::after{content:"→"}
.link-more:hover{color:var(--flag-red);gap:12px}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-size:14px;
  letter-spacing:.04em;
  line-height:1.2;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--ghost{border-color:var(--rule-strong);color:var(--flag-white)}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:var(--flag-white)}
.btn--solid{background:var(--flag-red);border-color:var(--flag-red);color:#fff}
.btn--solid:hover{background:#a92c22;border-color:#a92c22}
.btn--blue{background:var(--flag-blue);border-color:var(--flag-blue);color:#fff}
.btn--blue:hover{background:#255bab;border-color:#255bab}
.btn--paper{border-color:rgba(36,28,22,.3);color:var(--brown)}
.btn--paper:hover{background:rgba(36,28,22,.08);border-color:var(--brown)}

/* ---------- 7. 经幡色标 / 印章 / 图片框 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.4;
  border:1px solid currentColor;
  white-space:nowrap;
}
.tag--blue{color:#9CC2F5;border-color:var(--flag-blue);background:rgba(47,111,208,.18)}
.tag--red{color:#F0A79F;border-color:var(--flag-red);background:rgba(200,54,43,.18)}
.tag--green{color:#8FD2AF;border-color:var(--flag-green);background:rgba(46,125,83,.2)}
.tag--yellow{color:#F2CE7A;border-color:var(--flag-yellow);background:rgba(227,160,8,.18)}
.section--paper .tag--blue,.section--card .tag--blue{color:#1B4C97;background:rgba(47,111,208,.12)}
.section--paper .tag--red,.section--card .tag--red{color:#9E2A22;background:rgba(200,54,43,.12)}
.section--paper .tag--green,.section--card .tag--green{color:#1F5E3D;background:rgba(46,125,83,.12)}
.section--paper .tag--yellow,.section--card .tag--yellow{color:#8A6100;background:rgba(227,160,8,.16)}

.stamp{
  display:inline-grid;
  place-items:center;
  min-width:64px;
  height:64px;
  padding:0 10px;
  font-family:var(--font-mono);
  font-size:20px;
  letter-spacing:.02em;
  border:1px solid var(--rule-strong);
  color:var(--haze);
}
.stamp--red{border-color:var(--flag-red);color:var(--flag-red)}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-2);
  border:1px solid var(--rule);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  display:block;
  padding:10px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--haze);
  border-top:1px solid var(--rule);
}
.media-frame--placeholder::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.06) 0 2px,transparent 2px 14px);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs{
  margin:0 0 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--haze);
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.breadcrumbs__item{display:flex;align-items:center;gap:8px}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:var(--rule-strong)}
.breadcrumbs__link{text-decoration:none;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--flag-red);border-bottom-color:var(--flag-red)}

/* ---------- 9. 左缘赛季竖轴 ---------- */
.season-rail{
  display:none;
  position:fixed;
  left:0;
  top:var(--header-h);
  bottom:0;
  width:var(--rail-w);
  z-index:60;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  padding:20px 0;
  background:rgba(11,27,51,.72);
  border-right:1px solid var(--rule);
}
.season-rail__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--haze);
  writing-mode:vertical-rl;
}
.season-rail__list{display:flex;flex-direction:column;align-items:center;gap:12px;list-style:none}
.season-rail__item{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--haze);
  text-decoration:none;
  padding:6px 0;
  border-right:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.season-rail__item:hover{color:var(--flag-white)}
.season-rail__item.is-active{color:var(--flag-white);border-right-color:var(--flag-red)}
@media (min-width:1200px){
  .season-rail{display:flex}
}

/* ---------- 10. 页头 ---------- */
.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:400;
  padding:12px 18px;
  font-size:14px;
  text-decoration:none;
  background:var(--flag-red);
  color:#fff;
}
.skip-link:focus{left:8px;top:8px}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s var(--ease),border-color .28s var(--ease);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(11,27,51,.82),rgba(11,27,51,0));
  transition:opacity .28s var(--ease);
}
.site-header.is-solid,
.site-header.is-nav-open{
  background:var(--ink);
  border-bottom-color:var(--rule);
}
.site-header.is-solid::before,
.site-header.is-nav-open::before{opacity:0}

.header-progress{
  position:absolute;
  left:0;right:0;top:0;
  height:3px;
  background:rgba(255,255,255,.1);
  opacity:0;
  transition:opacity .28s var(--ease);
}
.site-header.is-solid .header-progress{opacity:1}
.header-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--flag-blue) 0 20%,var(--flag-white) 20% 40%,var(--flag-red) 40% 60%,var(--flag-green) 60% 80%,var(--flag-yellow) 80% 100%);
  transition:width .12s linear;
}

.site-header__inner{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:14px 24px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:24px;
  min-height:var(--header-h);
}

.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--flag-white)}
.brand__stamp{
  flex:0 0 auto;
  width:38px;height:38px;
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--flag-red);
  border:1px solid var(--flag-red);
  background:rgba(200,54,43,.14);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:.01em;
  line-height:1.25;
  white-space:nowrap;
}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.3;
  color:var(--haze);
  white-space:nowrap;
}

.site-nav__list{display:flex;justify-content:center;align-items:center;gap:2px;list-style:none}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  display:block;
  padding:10px 13px;
  font-size:15px;
  line-height:1.3;
  letter-spacing:.02em;
  text-decoration:none;
  color:rgba(255,255,255,.78);
  border:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-nav__link:hover{color:#fff;border-color:var(--rule-strong)}
.site-nav__link[aria-current="page"]{
  color:#fff;
  border-color:var(--flag-red);
  background:rgba(200,54,43,.16);
}

.header-actions{display:flex;align-items:center;gap:10px}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  padding:0;
  border:1px solid var(--rule-strong);
  color:#fff;
  cursor:pointer;
  transition:border-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--flag-white)}
.nav-toggle__bar{
  display:block;
  width:18px;height:1.5px;
  margin:0 auto;
  background:currentColor;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle__bar + .nav-toggle__bar{margin-top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

@media (max-width:1180px){
  .header-actions .btn--ghost{display:none}
  .brand__tagline{display:none}
}
@media (max-width:900px){
  .site-header__inner{grid-template-columns:1fr auto;gap:16px}
  .nav-toggle{display:block}
  .header-actions .btn{display:none}
  .site-nav{
    position:fixed;
    inset:var(--header-h) 0 0 0;
    z-index:110;
    padding:28px 24px 48px;
    background:var(--ink-2);
    border-top:1px solid var(--rule);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0}
  .site-nav__link{
    font-family:var(--font-display);
    font-weight:900;
    font-size:24px;
    padding:16px 4px;
    color:#fff;
    border:0;
    border-bottom:1px solid var(--rule);
  }
  .site-nav__link[aria-current="page"]{color:var(--flag-red);background:none}
}
@media (max-width:640px){
  :root{--header-h:64px}
  .site-header__inner{padding:10px 16px}
  .container{padding:0 16px}
  .brand__name{font-size:15px}
  .brand__stamp{width:34px;height:34px;font-size:12px}
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--ink-2);
  color:var(--flag-white);
  border-top:1px solid var(--rule);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:4px;
  background:linear-gradient(90deg,var(--flag-blue) 0 20%,var(--flag-white) 20% 40%,var(--flag-red) 40% 60%,var(--flag-green) 60% 80%,var(--flag-yellow) 80% 100%);
}
.site-footer__inner{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.site-footer__top{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,.8fr)) minmax(0,1.35fr);
  gap:44px 32px;
  padding:60px 0 44px;
}
.footer-brand__summary{
  margin:18px 0 0;
  max-width:30em;
  font-size:15px;
  line-height:1.75;
  color:rgba(255,255,255,.72);
}
.flag-legend{display:flex;flex-wrap:wrap;gap:8px 16px;list-style:none;margin:20px 0 0}
.flag-legend__item{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--haze);
}
.flag-legend__chip{flex:0 0 auto;width:10px;height:10px;border:1px solid rgba(255,255,255,.4)}
.flag-legend__chip--blue{background:var(--flag-blue);border-color:var(--flag-blue)}
.flag-legend__chip--red{background:var(--flag-red);border-color:var(--flag-red)}
.flag-legend__chip--green{background:var(--flag-green);border-color:var(--flag-green)}
.flag-legend__chip--yellow{background:var(--flag-yellow);border-color:var(--flag-yellow)}
.flag-legend__chip--white{background:#fff;border-color:#fff}

.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-weight:400;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--flag-white);
  padding-bottom:10px;
  border-bottom:1px solid var(--rule);
}
.footer-col__list{list-style:none}
.footer-col__item + .footer-col__item{margin-top:8px}
.footer-col__link{
  font-size:15px;
  text-decoration:none;
  color:rgba(255,255,255,.76);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-col__link:hover{color:#fff;padding-left:4px}

.footer-contact__row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:10px;
  padding:9px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--haze);
}
.footer-contact__val{
  font-size:14px;
  line-height:1.6;
  color:rgba(255,255,255,.9);
  word-break:break-word;
}
.footer-contact__note{
  margin:16px 0 0;
  font-size:13px;
  line-height:1.7;
  color:var(--haze);
}
.site-footer__base{border-top:1px solid var(--rule)}
.site-footer__base-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:20px 24px;
}
.footer-legal,.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--haze);
}
@media (max-width:1100px){
  .site-footer__top{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 28px}
}
@media (max-width:640px){
  .site-footer__inner{padding:0 16px}
  .site-footer__top{grid-template-columns:1fr;padding:44px 0 32px}
  .site-footer__base-inner{padding:18px 16px}
}

/* ---------- 12. 滚动显现 ---------- */
html.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
html.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.has-js [data-reveal]{opacity:1;transform:none}
}