/* ============================================================
   易发棋牌 · 共享样式 /assets/site.css
   骨架：reset → 变量 → 基础排版 → 布局容器 → 通用组件
        → 页头 → 页脚 → 图像容器 → 响应式 → 无障碍
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:24px}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,dt{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;border-spacing:0}
a{color:inherit;text-decoration:none}
button{cursor:pointer}
:focus-visible{outline:2px solid #F6D989;outline-offset:3px;border-radius:2px}
[hidden]{display:none !important}

@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}

/* ---------- 变量 ---------- */
:root{
  --ink:#071318;
  --ink-green:#0E2A25;
  --ink-blue:#0F1E3C;
  --gold:#E5B243;
  --gold-hi:#F6D989;
  --cinnabar:#C8372F;
  --neon:#3CE0CE;
  --mist:#F3F1E9;
  --glass:#A9B6B2;
  --bronze:#6B4E1E;

  --shell:1240px;
  --narrow:880px;
  --gutter:20px;
  --ease:cubic-bezier(.2,.7,.3,1);

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono","Roboto Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --cut:16px;
  --cut-sm:9px;
}

/* ---------- 基础排版 ---------- */
body{
  font-family:var(--font-display);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--mist);
  background:
    radial-gradient(90% 60% at 100% 0%, rgba(15,30,60,.75), transparent 62%),
    radial-gradient(80% 55% at 0% 12%, rgba(14,42,37,.85), transparent 60%),
    var(--ink);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-weight:800;line-height:1.25;letter-spacing:.01em}
h1{font-size:clamp(34px,5.2vw,56px)}
h2{font-size:clamp(26px,3.6vw,40px)}
h3{font-size:clamp(19px,2.2vw,24px);font-weight:700}
p{color:rgba(243,241,233,.86)}

strong{color:var(--mist);font-weight:700}
em{font-style:normal;color:var(--gold-hi)}

.u-mono,.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}

::selection{background:rgba(229,178,67,.35);color:var(--mist)}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:var(--narrow)}
.section{padding-block:clamp(52px,7vw,104px)}
.section--tight{padding-block:clamp(34px,4.5vw,64px)}
.section--green{background:linear-gradient(180deg,rgba(14,42,37,.92),rgba(14,42,37,.55))}
.section--blue{background:linear-gradient(180deg,rgba(15,30,60,.92),rgba(15,30,60,.5))}

.prose{max-width:640px}
.prose p + p{margin-top:14px}

.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:7fr 5fr}
.grid--asym-rev{grid-template-columns:5fr 7fr}

/* ---------- 文字层级组件 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  font-weight:600;color:var(--glass);
}
.kicker::before{
  content:"";width:16px;height:1px;background:var(--gold);flex:0 0 16px;
}
.kicker--neon{color:var(--neon)}
.kicker--neon::before{background:var(--neon)}

.section-title{
  font-size:clamp(28px,3.6vw,40px);
  font-weight:800;
  line-height:1.2;
  margin-top:10px;
}
.section-title em{color:var(--gold)}
.lead{
  font-size:clamp(16px,1.7vw,18px);
  line-height:1.85;
  color:rgba(243,241,233,.78);
  max-width:640px;
}
.display-xl{
  font-size:clamp(44px,8vw,128px);
  font-weight:900;
  line-height:1.02;
  letter-spacing:-.01em;
}
.rule-gold{
  height:1px;border:0;
  background:linear-gradient(90deg,transparent,rgba(229,178,67,.75) 20%,rgba(229,178,67,.75) 80%,transparent);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--glass);
}
.breadcrumb a{color:var(--glass);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--gold-hi)}
.breadcrumb__sep{color:var(--bronze)}
.breadcrumb [aria-current="page"]{color:var(--mist)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  font-size:13px;font-weight:600;letter-spacing:.14em;line-height:1.4;
  color:var(--mist);
  background:transparent;
  border:1px solid transparent;
  clip-path:polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--gold{
  background:linear-gradient(135deg,var(--gold-hi) 0%,var(--gold) 55%,#C9962F 100%);
  color:#13251F;
  box-shadow:0 10px 28px -16px rgba(229,178,67,.95);
}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px -16px rgba(246,217,137,1)}
.btn--ghost{
  background:rgba(243,241,233,.05);
  border-color:rgba(169,182,178,.42);
  color:var(--mist);
}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold-hi);transform:translateY(-2px)}
.btn--cinnabar{background:var(--cinnabar);color:#FFF4F1}
.btn--cinnabar:hover{transform:translateY(-2px)}

/* ---------- 内容卡片 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.2vw,26px);
  background:linear-gradient(160deg,rgba(14,42,37,.9) 0%,rgba(15,30,60,.72) 100%);
  border:1px solid rgba(107,78,30,.55);
  clip-path:polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(229,178,67,.6);box-shadow:0 22px 44px -30px rgba(0,0,0,.95)}
.card__title{font-size:20px;font-weight:800;line-height:1.35}
.card__body{margin-top:8px;font-size:15px;color:rgba(243,241,233,.75)}

/* ---------- 页头 ---------- */
.site-header{
  position:relative;
  z-index:90;
  background:
    radial-gradient(120% 150% at 50% -40%, rgba(229,178,67,.16), transparent 62%),
    linear-gradient(180deg,#08171E 0%,#071318 100%);
  border-bottom:1px solid rgba(107,78,30,.6);
}

.skip-link{
  position:absolute;left:12px;top:-60px;z-index:200;
  padding:10px 16px;
  background:var(--gold);color:#13251F;
  font-size:13px;font-weight:700;letter-spacing:.1em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:150;
  background:rgba(107,78,30,.3);
  pointer-events:none;
}
.scroll-progress__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--gold) 0%,var(--gold-hi) 45%,var(--neon) 100%);
  box-shadow:0 0 12px rgba(229,178,67,.7);
}

/* 顶部状态横栏 */
.header-bar{
  background:linear-gradient(90deg,rgba(14,42,37,.85),rgba(15,30,60,.85));
  border-bottom:1px solid rgba(107,78,30,.45);
}
.header-bar__inner{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:8px var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.header-tagline{
  display:flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:.18em;color:var(--glass);
  margin:0;
}
.header-tagline__dot{
  width:7px;height:7px;flex:0 0 7px;border-radius:50%;
  background:var(--neon);
  box-shadow:0 0 10px rgba(60,224,206,.9);
  animation:pulse-dot 2.4s var(--ease) infinite;
}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.header-bar__actions{display:flex;align-items:center;gap:10px}
.header-bar__actions .btn{padding:7px 15px;font-size:12px}

/* 刊头 */
.masthead__inner{
  position:relative;
  max-width:var(--shell);margin-inline:auto;
  padding:22px var(--gutter) 6px;
  display:flex;flex-direction:column;align-items:center;
}

.brand{display:inline-flex;align-items:center;gap:14px}
.brand__glyph{
  position:relative;width:40px;height:40px;flex:0 0 40px;
  display:grid;place-items:center;
}
.brand__glyph::before{
  content:"";position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(107,78,30,.95);
}
.brand__glyph::after{
  content:"";position:absolute;inset:7px;border-radius:50%;
  border:1px dashed rgba(229,178,67,.8);
}
.brand__pip{
  width:10px;height:10px;
  background:linear-gradient(140deg,var(--gold-hi),var(--gold));
  transform:rotate(45deg);
  box-shadow:0 0 14px rgba(229,178,67,.85);
}
.brand__lockup{display:flex;flex-direction:column;line-height:1.15}
.brand__name{
  font-size:clamp(22px,2.6vw,28px);
  font-weight:900;letter-spacing:.16em;color:var(--mist);
}
.brand__meta{
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.34em;color:var(--glass);text-transform:uppercase;
}

/* 移动导航按钮 */
.nav-toggle{
  position:absolute;top:22px;right:var(--gutter);
  display:none;align-items:center;gap:9px;
  padding:9px 13px;
  background:rgba(229,178,67,.08);
  border:1px solid rgba(229,178,67,.5);
  color:var(--gold);
  font-size:12px;letter-spacing:.2em;
  clip-path:polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
}
.nav-toggle__bars{display:grid;gap:3.5px;width:16px}
.nav-toggle__bars span{
  display:block;height:1.5px;width:100%;
  background:currentColor;
  transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* 导航 */
.site-nav{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.site-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:0 4px}
.site-nav__list a{
  position:relative;display:block;
  padding:13px 20px;
  font-size:14px;font-weight:500;letter-spacing:.14em;
  color:var(--glass);
  transition:color .2s var(--ease);
}
.site-nav__list a:hover{color:var(--gold-hi)}
.site-nav__list a[aria-current="page"]{color:var(--gold);font-weight:700}
.site-nav__list a[aria-current="page"]::after{
  content:"";position:absolute;left:20px;right:20px;bottom:7px;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:
    radial-gradient(100% 120% at 50% 0%, rgba(14,42,37,.9), transparent 70%),
    linear-gradient(180deg,#08171E 0%,#050D11 100%);
  border-top:1px solid rgba(107,78,30,.7);
}
.footer-hatch{
  height:6px;
  background:repeating-linear-gradient(135deg,rgba(229,178,67,.55) 0 8px,transparent 8px 18px);
  opacity:.55;
}
.footer-shell{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(34px,4.5vw,60px) var(--gutter) clamp(26px,3vw,40px);
  display:grid;
  grid-template-columns:1.1fr 1.4fr 1.3fr;
  gap:clamp(24px,3.4vw,54px);
}
.footer-brand__name{
  font-size:24px;font-weight:900;letter-spacing:.16em;color:var(--mist);
}
.footer-brand__line{
  margin-top:10px;
  font-size:12.5px;letter-spacing:.14em;color:var(--glass);
  line-height:2;
}
.footer-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.footer-col__title{
  font-size:12px;font-weight:700;letter-spacing:.24em;
  color:var(--gold);text-transform:uppercase;
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px dashed rgba(107,78,30,.6);
}
.footer-col__list li + li{margin-top:9px}
.footer-col__list a{
  font-size:14px;color:var(--glass);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-col__list a:hover{color:var(--gold-hi);padding-left:5px}

.footer-contact__list{display:grid;gap:12px}
.footer-contact__item{display:grid;grid-template-columns:70px 1fr;gap:10px;align-items:start}
.footer-contact__item dt{
  font-size:11px;letter-spacing:.2em;color:var(--bronze);
  text-transform:uppercase;padding-top:3px;
}
.footer-contact__item dd{
  font-family:var(--font-mono);
  font-size:13.5px;line-height:1.7;color:var(--mist);
  word-break:break-word;
}
.footer-contact__note{
  margin-top:16px;padding-top:14px;
  border-top:1px solid rgba(107,78,30,.4);
  font-size:12px;line-height:1.9;color:var(--glass);
}

.footer-legal{border-top:1px solid rgba(107,78,30,.45)}
.footer-legal__inner{
  max-width:var(--shell);margin-inline:auto;
  padding:16px var(--gutter);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
}
.footer-legal__copy,.footer-legal__icp{
  font-size:12px;letter-spacing:.14em;color:var(--glass);
}
.footer-legal__icp{font-family:var(--font-mono)}

/* 返回顶部 */
.to-top{
  position:fixed;right:clamp(14px,2vw,26px);bottom:clamp(14px,2vw,26px);z-index:120;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 15px;
  background:linear-gradient(150deg,rgba(14,42,37,.96),rgba(15,30,60,.96));
  border:1px solid rgba(229,178,67,.55);
  color:var(--gold);
  font-size:11px;letter-spacing:.22em;
  clip-path:polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--gold-hi);color:var(--gold-hi)}
.to-top__glyph{
  width:0;height:0;
  border-left:5px solid transparent;border-right:5px solid transparent;
  border-bottom:7px solid currentColor;
}

/* ---------- 图像容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(150deg,#0E2A25 0%,#0F1E3C 58%,#071318 100%);
  border:1px solid rgba(107,78,30,.6);
  clip-path:polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:repeating-linear-gradient(135deg,rgba(243,241,233,.045) 0 2px,transparent 2px 10px);
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture,
.media-frame > video,
.media-frame > .media-frame__fill{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media-frame__fill{
  background:
    radial-gradient(70% 70% at 30% 25%, rgba(229,178,67,.35), transparent 60%),
    radial-gradient(60% 60% at 75% 80%, rgba(60,224,206,.28), transparent 62%),
    linear-gradient(140deg,#0E2A25,#0F1E3C 60%,#071318);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--band{aspect-ratio:21/9}

/* ---------- 滚动显现 ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(24px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 目录跟随（页面阶段可选） ---------- */
[data-toc-link]{
  display:block;
  padding:8px 0 8px 14px;
  border-left:1px solid rgba(107,78,30,.6);
  font-size:13px;letter-spacing:.08em;color:var(--glass);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
[data-toc-link][aria-current="true"]{color:var(--gold);border-color:var(--gold)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-shell{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--gutter:16px}
  .header-bar__actions .btn--ghost{display:none}
  .nav-toggle{display:inline-flex}
  .masthead__inner{align-items:flex-start;padding:16px var(--gutter) 0}
  .brand{padding-right:76px}
  .site-nav{
    max-height:0;overflow:hidden;padding-inline:var(--gutter);
    transition:max-height .38s var(--ease);
  }
  .site-nav[data-open]{max-height:560px}
  .site-nav__list{flex-direction:column;align-items:stretch;padding:6px 0 14px;gap:0}
  .site-nav__list a{
    padding:14px 2px;
    border-bottom:1px dashed rgba(107,78,30,.5);
    font-size:15px;
  }
  .site-nav__list a[aria-current="page"]::after{left:2px;right:auto;width:26px;bottom:9px}
  .grid--asym,.grid--asym-rev{grid-template-columns:1fr}
  .grid--2,.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
  .footer-cols{gap:18px}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .header-tagline{font-size:11px;letter-spacing:.12em}
  .header-bar__actions .btn{padding:6px 12px;font-size:11px}
  .footer-shell{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr 1fr}
  .footer-contact__item{grid-template-columns:1fr}
  .footer-contact__item dt{padding-top:0}
  .footer-legal__inner{flex-direction:column;align-items:flex-start}
  .to-top__text{display:none}
  .to-top{padding:12px 13px}
}

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