/* ==========================================================================
   九州娱乐看台 · /assets/site.css
   体系：夜间看台坐标系统 — 墨绿基底 / 熔岩橙强调 / 精密网格 / 斜切刻度
   ========================================================================== */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}
::selection{background:var(--lava);color:var(--sand);}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#0B1F17;
  --panel:#123329;
  --pitch:#1F5C46;
  --lava:#E8552D;
  --amber:#F2A03D;
  --sand:#F6E9D2;
  --steel:#6E8CA0;
  --steel-soft:#AFC4CE;
  --paper:#E9F1EA;
  --alert:#C43A1F;

  --rail-w:88px;
  --strip-h:40px;
  --topbar-h:56px;
  --gutter:24px;
  --maxw:1280px;

  --line:rgba(110,140,160,.26);
  --line-soft:rgba(110,140,160,.13);

  --font-display:"Arial Narrow","Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 3. 基础排版 ---------- */
body{
  background-color:var(--ink);
  background-image:
    linear-gradient(to right, rgba(175,196,206,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(175,196,206,.05) 1px, transparent 1px);
  background-size:48px 48px;
  background-attachment:fixed;
  color:var(--sand);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  padding-left:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:800;
  font-stretch:condensed;
  line-height:1.06;
  letter-spacing:-.015em;
  color:var(--sand);
}
h1{font-size:clamp(34px,5.6vw,64px);letter-spacing:-.03em;}
h2{font-size:clamp(26px,3.6vw,44px);letter-spacing:-.022em;}
h3{font-size:clamp(20px,2.4vw,32px);}
h4{font-size:19px;letter-spacing:.01em;}

.num,[data-num]{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

/* ---------- 4. 骨架与容器 ---------- */
.shell{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);}
.page-main{display:block;min-height:52vh;}
.rule{height:1px;border:0;background:var(--line);margin:40px 0;}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter);}
.grid-12 > *{min-width:0;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

/* ---------- 5. 头部骨架 ---------- */
.site-header{position:relative;z-index:10;}

.skip-link{
  position:fixed;
  left:var(--rail-w);
  top:-120px;
  z-index:200;
  padding:10px 20px;
  background:var(--sand);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus{top:8px;}

.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lava),var(--amber));
  z-index:130;
  pointer-events:none;
}

/* ---------- 6. 桌面侧边轨道 ---------- */
.site-rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:16px 0 18px;
  background:var(--panel);
  border-right:1px solid var(--line);
  z-index:120;
  overflow-y:auto;
  overscroll-behavior:contain;
}

.rail-brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  width:100%;
  padding:0 0 16px;
  border-bottom:1px solid var(--line-soft);
  text-decoration:none;
}
.rail-brand-mark{
  writing-mode:vertical-rl;
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.3em;
  color:var(--sand);
  line-height:1.1;
}
.rail-brand-sub{
  writing-mode:vertical-rl;
  font-size:10px;
  letter-spacing:.26em;
  color:var(--steel);
  line-height:1.2;
}

.rail-nav-list{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:100%;
  padding:14px 0;
}
.rail-nav-item{display:flex;justify-content:center;width:100%;}
.rail-nav-link{
  display:block;
  writing-mode:vertical-rl;
  padding:12px 0;
  font-size:12.5px;
  letter-spacing:.2em;
  color:var(--steel-soft);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.rail-nav-link:hover{color:var(--sand);background:rgba(31,92,70,.5);}
.rail-nav-link[aria-current="page"]{
  color:var(--sand);
  background:rgba(232,85,45,.16);
  border-left-color:var(--lava);
}

.rail-foot{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  width:100%;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
}
.rail-coord-label{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.3em;
  color:var(--steel);
}
.rail-coord-value{
  writing-mode:vertical-rl;
  max-height:110px;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--amber);
}

.rail-scrim{
  position:fixed;
  inset:0;
  background:rgba(4,12,9,.68);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s ease;
  z-index:110;
}
.rail-scrim[data-open="true"]{opacity:1;pointer-events:auto;}

/* ---------- 7. 移动端顶栏 ---------- */
.site-topbar{display:none;}

.rail-toggle{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;
  height:40px;
  padding:0 8px;
  border:1px solid var(--line);
  transition:border-color .2s ease;
}
.rail-toggle span{
  display:block;
  width:100%;
  height:1.5px;
  background:var(--sand);
  transition:transform .2s ease,opacity .2s ease;
}
.rail-toggle:hover{border-color:var(--amber);}
.rail-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.rail-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.rail-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

.topbar-brand{
  font-family:var(--font-display);
  font-weight:800;
  font-size:16px;
  letter-spacing:.16em;
  color:var(--sand);
  text-decoration:none;
}
.topbar-search{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  text-decoration:none;
  transition:border-color .2s ease;
}
.topbar-search:hover{border-color:var(--amber);}
.ico-search{
  position:relative;
  display:block;
  width:13px;
  height:13px;
  border:1.5px solid var(--steel-soft);
  border-radius:1px;
}
.ico-search::after{
  content:"";
  position:absolute;
  right:-6px;
  bottom:-5px;
  width:7px;
  height:1.5px;
  background:var(--steel-soft);
  transform:rotate(45deg);
  transform-origin:0 50%;
}

/* ---------- 8. 状态条 ---------- */
.status-strip{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(11,31,23,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.status-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  max-width:var(--maxw);
  margin:0 auto;
  height:var(--strip-h);
  padding:0 var(--gutter);
}
.status-meta{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--steel-soft);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.status-dot{
  flex:0 0 auto;
  width:6px;height:6px;
  background:var(--lava);
  box-shadow:0 0 0 3px rgba(232,85,45,.16);
  animation:rail-pulse 3.6s ease-in-out infinite;
}
@keyframes rail-pulse{0%,100%{opacity:1;}50%{opacity:.35;}}

.status-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto;}
.status-cta{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 14px;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.1em;
  color:#1A0D07;
  background:var(--amber);
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% 100%,9px 100%);
  transition:background .2s ease,color .2s ease;
}
.status-cta:hover{background:var(--sand);}
.status-cta--ghost{
  background:transparent;
  color:var(--sand);
  clip-path:none;
  box-shadow:inset 0 0 0 1px var(--line);
}
.status-cta--ghost:hover{background:rgba(31,92,70,.55);color:var(--sand);}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  margin-top:80px;
  background:linear-gradient(180deg,var(--panel) 0%,#0E2A21 62%,var(--ink) 100%);
  border-top:1px solid var(--line);
  color:var(--sand);
}
.footer-frame{
  max-width:var(--maxw);
  margin:0 auto;
  padding:52px var(--gutter) 0;
}
.footer-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:20px 32px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(22px,3vw,34px);
  letter-spacing:.08em;
  color:var(--sand);
  text-decoration:none;
}
.footer-brand:hover{color:var(--amber);}
.footer-closing{
  flex:1 1 260px;
  max-width:44ch;
  font-size:13px;
  line-height:1.65;
  color:var(--steel-soft);
}
.footer-jump{
  display:inline-flex;
  align-items:center;
  gap:9px;
  height:36px;
  padding:0 15px;
  border:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--amber);
  transition:background .2s ease,border-color .2s ease;
}
.footer-jump::before{
  content:"";
  width:8px;height:8px;
  border-top:1.5px solid currentColor;
  border-left:1.5px solid currentColor;
  transform:rotate(45deg);
}
.footer-jump:hover{background:rgba(242,160,61,.12);border-color:var(--amber);}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:36px 24px;
  padding:34px 0;
}
.footer-col{min-width:0;}
.footer-col-title{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:15px;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--steel);
}
.footer-col-title::before{
  content:"";
  width:14px;height:1px;
  background:var(--lava);
}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-link{
  font-size:14px;
  color:var(--steel-soft);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-link:hover{color:var(--amber);}
.footer-text{
  display:block;
  font-size:13.5px;
  line-height:1.6;
  color:var(--steel-soft);
  word-break:break-word;
}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:7px;
  padding:20px 0;
  border-top:1px solid var(--line-soft);
}
.footer-contact-text{
  font-size:13px;
  line-height:1.7;
  color:var(--steel-soft);
}
.footer-legal{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px 24px;
  min-height:48px;
  padding:12px 0;
  border-top:1px solid var(--line);
}
.footer-copy{font-size:12.5px;color:var(--steel);}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:18px;font-size:12.5px;}
.footer-legal-links a{color:var(--steel-soft);text-decoration:none;transition:color .18s ease;}
.footer-legal-links a:hover{color:var(--sand);}
.footer-icp{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.02em;
  color:var(--steel);
}

/* ---------- 10. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:44px;
  padding:0 22px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn--solid{
  background:var(--lava);
  color:var(--sand);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),0 100%);
}
.btn--solid:hover{background:var(--amber);color:#1A0D07;}
.btn--ghost{
  background:rgba(31,92,70,.26);
  border-color:var(--line);
  color:var(--sand);
}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber);}
.btn--quiet{
  min-height:auto;
  padding:0 0 3px;
  color:var(--steel-soft);
  border-bottom:1px solid var(--lava);
}
.btn--quiet:hover{color:var(--sand);}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{padding:22px 0 0;}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--steel);
}
.breadcrumb-item{display:flex;align-items:center;gap:9px;}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--steel);opacity:.55;}
.breadcrumb-link{color:var(--steel-soft);text-decoration:none;transition:color .18s ease;}
.breadcrumb-link:hover{color:var(--amber);}
.breadcrumb-item[aria-current="page"]{color:var(--sand);}

/* ---------- 12. 正文 ---------- */
.prose{
  max-width:72ch;
  font-size:16px;
  line-height:1.75;
  color:var(--sand);
}
.prose p + p{margin-top:1.1em;}
.prose h2{margin:2em 0 .55em;}
.prose h3{margin:1.7em 0 .45em;}
.prose h4{margin:1.4em 0 .4em;color:var(--amber);}
.prose ul,.prose ol{display:flex;flex-direction:column;gap:.55em;margin:1em 0;}
.prose li{position:relative;padding-left:20px;}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.78em;
  width:9px;height:1.5px;
  background:var(--lava);
}
.prose a{
  color:var(--amber);
  text-decoration:none;
  border-bottom:1px solid rgba(242,160,61,.42);
}
.prose a:hover{border-bottom-color:var(--amber);}
.prose strong{color:var(--amber);font-weight:700;}

/* ---------- 13. 章节头与标签 ---------- */
.section-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px 20px;
  padding-bottom:14px;
  margin-bottom:26px;
  border-bottom:1px solid var(--line);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.3em;
  color:var(--lava);
}
.section-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(20px,2.4vw,32px);
  letter-spacing:-.012em;
  color:var(--sand);
}
.tag{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--sand);
  background:rgba(31,92,70,.72);
  border-left:2px solid var(--lava);
}
.tag--amber{
  background:rgba(242,160,61,.16);
  color:var(--amber);
  border-left-color:var(--amber);
}

/* ---------- 14. 坐标与数据块 ---------- */
.coord{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--steel);
}
.coord::before{
  content:"";
  width:10px;height:10px;
  border:1px solid var(--lava);
}

.data-block{
  position:relative;
  padding:24px 20px 20px;
  background:var(--panel);
  border:1px solid var(--line);
  transition:background .2s ease,border-color .2s ease;
}
.data-block::after{
  content:"";
  position:absolute;
  top:0;left:0;
  width:64px;height:3px;
  background:var(--lava);
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
}
.data-block:hover{background:#16382C;border-color:rgba(242,160,61,.42);}
.data-block:hover .data-num{color:var(--sand);}
.data-num{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4vw,44px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--amber);
  transition:color .2s ease;
}
.data-label{
  display:block;
  margin-top:9px;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--steel-soft);
}

/* ---------- 15. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--panel);
  border:1px solid var(--line);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,31,23,0) 28%,rgba(11,31,23,.8) 100%);
  pointer-events:none;
}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-caption{
  margin-top:10px;
  font-size:12.5px;
  line-height:1.6;
  color:var(--steel);
}

/* ---------- 16. 显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .34s ease,transform .34s ease;
}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 17. 平板 ---------- */
@media (max-width:1023px){
  body{
    padding-left:0;
    padding-top:var(--topbar-h);
  }
  body.nav-open{overflow:hidden;}

  .skip-link{left:8px;}

  .site-topbar{
    position:fixed;
    top:0;left:0;right:0;
    height:var(--topbar-h);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 16px;
    background:rgba(11,31,23,.97);
    border-bottom:1px solid var(--line);
    z-index:105;
  }

  .site-rail{
    width:min(84vw,320px);
    align-items:stretch;
    padding:20px 0 22px;
    transform:translateX(-104%);
    visibility:hidden;
    box-shadow:8px 0 24px rgba(0,0,0,.35);
    transition:transform .24s cubic-bezier(.4,0,.2,1),visibility .24s;
    z-index:120;
  }
  .site-rail[data-open="true"]{
    transform:translateX(0);
    visibility:visible;
  }

  .rail-brand{
    flex-direction:row;
    align-items:baseline;
    justify-content:flex-start;
    gap:12px;
    padding:0 20px 18px;
  }
  .rail-brand-mark{writing-mode:horizontal-tb;font-size:19px;letter-spacing:.14em;line-height:1.2;}
  .rail-brand-sub{writing-mode:horizontal-tb;font-size:11px;letter-spacing:.2em;}

  .rail-nav-list{justify-content:flex-start;padding:8px 0;gap:2px;}
  .rail-nav-item{display:block;}
  .rail-nav-link{
    writing-mode:horizontal-tb;
    width:100%;
    padding:13px 20px;
    font-size:14.5px;
    letter-spacing:.12em;
    border-left:3px solid transparent;
  }

  .rail-foot{
    flex-direction:row;
    align-items:baseline;
    justify-content:space-between;
    gap:10px;
    padding:16px 20px 0;
  }
  .rail-coord-value{writing-mode:horizontal-tb;max-height:none;}

  .status-strip{position:static;}
  .status-inner{height:auto;min-height:var(--strip-h);padding:8px 16px;gap:10px;}
  .status-meta{font-size:11px;}
  .status-cta--ghost{display:none;}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 24px;}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 6;}
}

/* ---------- 18. 手机 ---------- */
@media (max-width:639px){
  :root{--gutter:16px;}
  body{font-size:16px;}

  .status-actions{gap:6px;}
  .status-cta{padding:0 11px;font-size:12px;letter-spacing:.06em;}

  .footer-frame{padding-top:38px;}
  .footer-head{align-items:flex-start;flex-direction:column;gap:14px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:10px;min-height:0;padding:16px 0 20px;}
  .footer-legal-links{gap:14px;}

  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 2;}

  .data-block{padding:20px 16px 16px;}
}

/* ---------- 19. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
  .status-dot{animation:none;}
}