/* ===========================================================
   99棋牌电玩 · 共享样式 /assets/site.css
   reset / tokens / 中文排版 / 头部 / 页脚 / 通用组件
   =========================================================== */

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

/* ---------- tokens ---------- */
:root{
  --ink:#07110E;
  --green:#0B2F26;
  --gold:#C9A24A;
  --neon:#35F2E0;
  --magenta:#FF2E93;
  --wine:#5B1230;
  --indigo:#241B4A;
  --paper:#F2F7F3;
  --moss:#9DB3A8;
  --amber:#FFC24B;

  --rail-w:96px;
  --topbar-h:56px;
  --navbar-h:64px;
  --header-offset:120px;

  --hard-shadow:6px 6px 0 rgba(0,0,0,.5);
  --line-gold:rgba(201,162,74,.5);
  --ease:cubic-bezier(.2,.7,.3,1);

  --font-display:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Courier New",monospace;
}

/* ---------- base ---------- */
body{
  min-height:100%;
  padding-left:var(--rail-w);
  background-color:var(--ink);
  background-image:
    radial-gradient(62vw 42vh at 6% 0%, rgba(53,242,224,.10), transparent 62%),
    radial-gradient(52vw 40vh at 98% 2%, rgba(255,46,147,.10), transparent 64%),
    repeating-linear-gradient(0deg, rgba(201,162,74,.045) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(201,162,74,.045) 0 1px, transparent 1px 34px);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
}

h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:800;line-height:1.15;letter-spacing:-.012em;color:var(--paper)}
strong{font-weight:800}
#main-content{display:block;padding-top:var(--header-offset);outline:none}
html.nav-open{overflow:hidden}

:focus-visible{outline:3px solid var(--neon);outline-offset:3px}
.site-nav__link:focus-visible{outline-offset:-3px}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  padding:10px 16px;
  background:var(--neon);color:var(--ink);
  font-weight:800;font-size:14px;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(0,0,0,.5);
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- header shell ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:70;pointer-events:none}
.site-header > *{pointer-events:auto}

.header-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:72;
  display:flex;flex-direction:column;align-items:center;gap:16px;
  padding:20px 6px 18px;
  background:
    repeating-linear-gradient(0deg, rgba(201,162,74,.07) 0 1px, transparent 1px 22px),
    linear-gradient(180deg,var(--green) 0%, #061712 55%, var(--indigo) 100%);
  border-right:2px solid var(--gold);
  box-shadow:8px 0 26px rgba(0,0,0,.5);
}

.rail-brand{display:flex;flex-direction:column;align-items:center;gap:10px;padding:4px 0}
.rail-brand__num{
  font-family:var(--font-mono);font-size:26px;font-weight:700;line-height:1;
  color:var(--neon);text-shadow:0 0 16px rgba(53,242,224,.6);
}
.rail-brand__name{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-family:var(--font-display);font-weight:900;font-size:15px;
  letter-spacing:.34em;color:var(--paper);
}
.rail-anno{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:12px;letter-spacing:.24em;color:var(--moss);
}
.rail-index{
  margin-top:auto;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--gold);
}
.rail-progress{
  position:relative;width:4px;height:110px;overflow:hidden;
  background:rgba(201,162,74,.22);
}
.rail-progress__fill{
  position:absolute;top:0;left:0;width:100%;height:var(--progress,0%);
  background:linear-gradient(180deg,var(--neon),var(--magenta));
  transition:height .12s linear;
}

.header-stack{
  margin-left:var(--rail-w);
  background:rgba(7,17,14,.93);
  border-bottom:2px solid var(--line-gold);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}

/* 上层：品牌说明 */
.header-topbar{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  height:var(--topbar-h);
  padding:0 clamp(14px,2.6vw,36px);
  border-bottom:1px dashed rgba(201,162,74,.32);
  font-size:13px;color:var(--moss);
}
.topbar-brand{display:flex;align-items:center;gap:12px;flex-wrap:wrap;min-width:0}
.topbar-brand__mark{font-weight:800;color:var(--paper);letter-spacing:.04em}
.topbar-brand__tag{
  padding-left:12px;border-left:1px solid rgba(201,162,74,.45);
  color:var(--moss);
}
.topbar-meta{
  margin-left:auto;display:flex;align-items:center;gap:16px;
  font-family:var(--font-mono);font-size:12px;color:var(--moss);white-space:nowrap;
}
.topbar-mail{color:var(--amber)}
.header-cta{flex:0 0 auto;padding:8px 14px;font-size:13.5px}

/* 下层：栏目导航 */
.header-navbar{
  display:flex;align-items:center;gap:18px;
  height:var(--navbar-h);
  padding:0 clamp(14px,2.6vw,36px);
}
.site-nav{display:flex;flex:1 1 auto;align-items:center;gap:18px;min-width:0}
.site-nav__list{display:flex;align-items:center;gap:clamp(4px,1.2vw,18px)}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:7px;
  padding:10px;font-weight:800;font-size:15px;color:var(--paper);
  border-bottom:2px solid transparent;
  transition:color .16s ease,border-color .16s ease,background-color .16s ease,text-shadow .16s ease;
}
.site-nav__link:hover{
  color:var(--neon);border-bottom-color:var(--neon);
  background:linear-gradient(180deg,transparent,rgba(53,242,224,.16));
  text-shadow:0 0 14px rgba(53,242,224,.55);
}
.site-nav__link[aria-current="page"]{
  color:var(--neon);border-bottom-color:var(--magenta);
  background:linear-gradient(180deg,transparent,rgba(255,46,147,.18));
}
.site-nav__num{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--gold)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--magenta)}
.site-nav__foot,.site-nav__cta{display:none}

/* 移动导航按钮：桌面隐藏 */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 12px;border:2px solid var(--neon);color:var(--neon);
  background:rgba(7,17,14,.9);font-weight:700;
  box-shadow:3px 3px 0 rgba(0,0,0,.55);
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px}
.nav-toggle__bars i{display:block;width:16px;height:2px;background:currentColor}
.nav-toggle__label{font-size:12.5px;letter-spacing:.08em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border:2px solid var(--gold);
  background:rgba(11,47,38,.72);color:var(--paper);
  font-weight:800;font-size:14.5px;letter-spacing:.02em;
  box-shadow:4px 4px 0 rgba(0,0,0,.45);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(0,0,0,.5)}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(0,0,0,.45)}
.btn--neon{
  border-color:var(--neon);color:var(--neon);background:rgba(53,242,224,.08);
  text-shadow:0 0 12px rgba(53,242,224,.45);
}
.btn--neon:hover{
  background:var(--neon);color:var(--ink);text-shadow:none;
  box-shadow:7px 7px 0 rgba(53,242,224,.25);
}
.btn--magenta{border-color:var(--magenta);background:var(--magenta);color:#170410}
.btn--solid{background:var(--neon);border-color:var(--neon);color:var(--ink)}

/* ---------- 排版工具 ---------- */
.wrap{width:min(1320px,100%);margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}
.prose p{max-width:66ch}
.prose p + p{margin-top:1em}
.lead{font-size:clamp(16px,1.6vw,19px);line-height:1.75;color:#DCE8E1}
.type-display{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(44px,7vw,112px);line-height:1.02;letter-spacing:-.035em;
  text-shadow:3px 3px 0 rgba(0,0,0,.55);
}
.type-display--neon{color:var(--neon);text-shadow:0 0 26px rgba(53,242,224,.35)}
.mono{font-family:var(--font-mono);color:var(--neon);letter-spacing:.02em}
.anno{font-size:12.5px;letter-spacing:.28em;color:var(--moss)}
.anno--vertical{writing-mode:vertical-rl;text-orientation:mixed}

/* ---------- 区块与栅格 ---------- */
.section{padding-block:clamp(32px,5vw,64px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px 20px;
  padding-bottom:12px;margin-bottom:clamp(18px,3vw,28px);
  border-bottom:2px solid rgba(201,162,74,.45);
}
.section__title{font-size:clamp(24px,3.2vw,40px);font-weight:900;letter-spacing:-.02em}
.section__note{margin-left:auto;font-size:13px;color:var(--moss)}
.content-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.col-main{grid-column:1 / span 7;min-width:0}
.col-aside{grid-column:9 / span 4;min-width:0}

/* ---------- 卡片 / 标签 / 徽章 ---------- */
.card{
  position:relative;padding:clamp(16px,2vw,24px);
  background:rgba(11,47,38,.62);
  border:2px solid var(--line-gold);
  box-shadow:var(--hard-shadow);
}
.card--indigo{background:rgba(36,27,74,.58)}
.card--wine{background:rgba(91,18,48,.5)}
.card__title{font-size:19px;font-weight:800;margin-bottom:8px}
.card__meta{font-family:var(--font-mono);font-size:12px;color:var(--moss)}

.tag{
  display:inline-block;padding:3px 9px;border:1px solid currentColor;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
}
.tag--neon{color:var(--neon)}
.tag--magenta{color:var(--magenta)}
.tag--amber{color:var(--amber)}
.tag--gold{color:var(--gold)}

.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border:2px solid var(--gold);
  background:rgba(36,27,74,.6);box-shadow:3px 3px 0 rgba(0,0,0,.5);
  font-family:var(--font-mono);font-size:12px;color:var(--amber);
}
.badge__dot{width:8px;height:8px;background:var(--neon);box-shadow:0 0 10px var(--neon)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-top:14px;font-family:var(--font-mono);font-size:12px;color:var(--moss);
}
.breadcrumb__link{transition:color .16s ease}
.breadcrumb__link:hover{color:var(--neon)}
.breadcrumb__sep{color:var(--gold)}
.breadcrumb__current{color:var(--paper)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16 / 10;
  border:2px solid rgba(201,162,74,.55);
  background:
    repeating-linear-gradient(45deg, rgba(53,242,224,.07) 0 10px, transparent 10px 20px),
    linear-gradient(140deg,var(--indigo),var(--green));
  box-shadow:8px 8px 0 rgba(0,0,0,.5);
}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 12px;font-size:12.5px;color:var(--moss);
  background:linear-gradient(0deg,rgba(7,17,14,.94),transparent);
}
.media-frame--empty{
  display:grid;place-items:center;text-align:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--moss);
}

/* ---------- 标签页 / 分段切换 ---------- */
.tabs{margin-top:24px}
.tabs__list{display:flex;flex-wrap:wrap;gap:6px;border-bottom:2px solid rgba(201,162,74,.45)}
.tabs__tab{
  padding:10px 16px;border:2px solid transparent;border-bottom:0;
  background:rgba(11,47,38,.55);color:var(--moss);
  font-weight:800;font-size:14.5px;
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.tabs__tab:hover{color:var(--paper);border-color:rgba(201,162,74,.5)}
.tabs__tab[aria-selected="true"]{
  background:var(--neon);border-color:var(--neon);color:var(--ink);
  box-shadow:0 -4px 18px rgba(53,242,224,.35);
}
.tabs__panel{padding-top:22px}
.tabs__panel[hidden]{display:none}

/* ---------- 显现 ---------- */
[data-reveal]{opacity:1;transform:none}
.has-js [data-reveal]{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s var(--ease)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,80px);
  border-top:3px solid var(--gold);
  color:var(--paper);
  background:
    radial-gradient(72vw 42vh at 88% 0%, rgba(255,46,147,.15), transparent 62%),
    linear-gradient(180deg,#061a15 0%, var(--green) 46%, #140a22 100%);
}
.site-footer__inner{
  max-width:1320px;margin:0 auto;
  padding:clamp(36px,5vw,64px) clamp(16px,3vw,40px) clamp(24px,3vw,36px);
  display:grid;grid-template-columns:minmax(230px,1fr) minmax(0,2.1fr);
  gap:clamp(24px,4vw,56px);
}
.footer-brand__mark{
  display:inline-block;font-family:var(--font-display);
  font-size:26px;font-weight:900;letter-spacing:.02em;color:var(--paper);
  text-shadow:0 0 18px rgba(53,242,224,.35);
}
.footer-brand__mark::after{
  content:"";display:block;width:56px;height:4px;margin-top:10px;
  background:linear-gradient(90deg,var(--neon),var(--magenta));
}
.footer-brand__line{margin-top:16px;font-size:13px;letter-spacing:.16em;color:var(--moss)}
.footer-brand__note{margin-top:10px;font-size:13px;color:var(--moss);max-width:32ch}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,32px)}
.footer-col__title{
  padding-bottom:10px;border-bottom:1px solid rgba(201,162,74,.4);
  font-family:var(--font-mono);font-size:12.5px;font-weight:700;
  letter-spacing:.18em;color:var(--gold);
}
.footer-col__list{margin-top:14px;display:grid;gap:9px}
.footer-link{
  font-size:14.5px;color:var(--paper);border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-link:hover{color:var(--neon);border-bottom-color:var(--neon)}

.footer-contact{
  grid-column:1 / -1;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px 24px;
  padding:18px 20px;
  border:2px solid rgba(201,162,74,.55);
  background:rgba(36,27,74,.42);
  box-shadow:6px 6px 0 rgba(0,0,0,.45);
}
.footer-contact__item{font-size:14px;color:var(--paper)}
.footer-contact__item--wide{grid-column:1 / -1}
.footer-contact__label{
  display:block;margin-bottom:3px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--moss);
}

.site-footer__base{
  max-width:1320px;margin:0 auto;
  padding:16px clamp(16px,3vw,40px) 26px;
  border-top:1px dashed rgba(201,162,74,.4);
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;
  font-size:12.5px;color:var(--moss);
}
.footer-base__legal{font-family:var(--font-mono);color:var(--gold)}
.footer-base__year{font-family:var(--font-mono)}
.to-top{
  margin-left:auto;padding:7px 14px;
  border:2px solid var(--gold);color:var(--gold);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  transition:color .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.to-top:hover{color:var(--neon);border-color:var(--neon);box-shadow:3px 3px 0 rgba(53,242,224,.25)}

/* ---------- 工具类 ---------- */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 响应式：小桌面 ---------- */
@media (max-width:1080px){
  :root{--rail-w:84px;--header-offset:114px}
  body{font-size:16px}
  .site-nav__link{font-size:14px;padding:10px 8px}
  .topbar-brand__tag{display:none}
}

/* ---------- 响应式：平板与手机，轨道收成顶部横条 ---------- */
@media (max-width:959px){
  :root{--rail-w:0px;--header-offset:82px}
  body{padding-left:0}
  .header-rail{
    top:0;left:0;right:0;bottom:auto;width:auto;height:58px;
    flex-direction:row;align-items:center;gap:12px;
    padding:0 92px 0 14px;z-index:76;
    border-right:0;border-bottom:2px solid var(--gold);
    box-shadow:0 8px 22px rgba(0,0,0,.5);
  }
  .rail-brand{flex-direction:row;align-items:center;gap:8px;padding:0}
  .rail-brand__num{font-size:24px}
  .rail-brand__name{writing-mode:horizontal-tb;text-orientation:initial;font-size:15px;letter-spacing:.18em}
  .rail-anno{display:none}
  .rail-index{margin-top:0;margin-left:auto}
  .rail-progress{
    position:absolute;left:0;right:0;bottom:0;width:auto;height:3px;
  }
  .rail-progress__fill{
    height:100%;width:var(--progress,0%);
    background:linear-gradient(90deg,var(--neon),var(--magenta));
    transition:width .12s linear;
  }

  .header-stack{margin-left:0;background:transparent;border-bottom:0;-webkit-backdrop-filter:none;backdrop-filter:none}
  .header-topbar{display:none}
  .header-navbar{display:block;height:0;padding:0}

  .nav-toggle{display:inline-flex;position:fixed;top:9px;right:12px;z-index:80}
  .nav-toggle[aria-expanded="true"]{background:var(--neon);color:var(--ink)}

  .site-nav{
    position:fixed;inset:0;z-index:78;
    display:block;margin:0;padding:88px 22px 36px;
    overflow-y:auto;
    background:
      radial-gradient(80vw 50vh at 82% 0%, rgba(53,242,224,.16), transparent 62%),
      linear-gradient(160deg,var(--green),var(--ink) 58%,var(--indigo));
    transform:translateY(-102%);opacity:0;visibility:hidden;
    transition:transform .32s var(--ease),opacity .24s ease,visibility .32s;
  }
  .site-nav[data-open="true"]{transform:none;opacity:1;visibility:visible}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav__item{width:100%}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:15px 6px;font-size:23px;
    border-bottom:2px solid rgba(201,162,74,.28);
  }
  .site-nav__num{font-size:12px}
  .site-nav__link:hover,.site-nav__link[aria-current="page"]{background:transparent}
  .site-nav__cta{display:inline-flex;margin-top:24px}
  .site-nav__foot{display:block;margin-top:18px;font-size:12.5px;color:var(--moss)}
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:768px){
  body{font-size:16px}
  .type-display{font-size:clamp(40px,11vw,64px)}
  .content-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
  .col-main{grid-column:1 / -1}
  .col-aside{grid-column:1 / -1}
  .section__note{margin-left:0;flex-basis:100%}
  .site-footer__inner{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}
}
@media (max-width:480px){
  .site-nav__link{font-size:20px;padding:13px 4px}
  .nav-toggle__label{display:none}
  .footer-contact{padding:16px 14px}
  .to-top{margin-left:0}
}

/* ---------- 无障碍：减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .rail-progress__fill{transition:none}
  .site-nav{transition:none}
}