/* ============================================================
   龙腾娱乐汇 · 共享样式表  /assets/site.css
   骨架：技术蓝图网格 ｜ 染色：藏地唐卡色系 ｜ 手感：粗野主义
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --ink:#0B0D10;
  --ink-soft:#3B4149;
  --paper:#F5F1E8;
  --grey:#8B9098;
  --cinnabar:#C8362B;
  --cinnabar-deep:#8E2119;
  --tibet-blue:#16324F;
  --bronze:#B98A2E;
  --sky:#2C7DBF;
  --banner-yellow:#F0C334;
  --teal:#2E8B72;

  --font-display:'Source Han Serif SC','Noto Serif SC','Songti SC','STSong',serif;
  --font-body:'Inter','HarmonyOS Sans SC','PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,'Liberation Mono',monospace;

  --page-max:1440px;
  --gutter:clamp(16px,3vw,44px);
  --axis-w:72px;
  --grid-cell:64px;
  --measure:62ch;

  --line:2px solid var(--ink);
  --shadow-hard:6px 6px 0 var(--ink);
  --shadow-hard-sm:4px 4px 0 var(--ink);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:112px;
}

body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0;}

ul,ol{padding:0;list-style:none;}

img,svg,video{display:block;max-width:100%;}

button,input,select,textarea{font:inherit;color:inherit;}

button{background:none;border:0;padding:0;cursor:pointer;}

a{color:inherit;text-decoration:none;}

table{border-collapse:collapse;width:100%;}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:3px solid var(--banner-yellow);
  outline-offset:3px;
}

::selection{background:var(--cinnabar);color:var(--paper);}

/* ---------- 3. 页面基底：蓝图方格画布 ---------- */
body{
  min-height:100vh;
  background-color:var(--paper);
  background-image:
    linear-gradient(to right,rgba(11,13,16,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(11,13,16,.055) 1px,transparent 1px);
  background-size:var(--grid-cell) var(--grid-cell);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- 4. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--ink);
  color:var(--paper);
  border-bottom:2px solid var(--cinnabar);
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-72px;
  z-index:200;
  display:inline-block;
  padding:10px 18px;
  background:var(--banner-yellow);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  border:2px solid var(--ink);
  box-shadow:var(--shadow-hard-sm);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px;}

.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,34px);
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding:14px var(--gutter);
  min-height:88px;
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
}
.brand-mark{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:42px;
  height:42px;
  background:var(--cinnabar);
  color:var(--paper);
  border:2px solid var(--cinnabar-deep);
  box-shadow:4px 4px 0 var(--cinnabar-deep);
  font-family:var(--font-display);
  font-weight:900;
  font-size:23px;
  line-height:1;
}
.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(19px,2vw,25px);
  line-height:1.15;
  letter-spacing:.02em;
  color:var(--paper);
  transition:color .16s var(--ease);
}
.brand-name:hover{color:var(--banner-yellow);}
.brand-tagline{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.5;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--grey);
  white-space:nowrap;
}

/* 中缝纵向刻度轴 */
.header-axis{
  position:relative;
  flex:1 1 auto;
  align-self:stretch;
  min-width:24px;
}
.header-axis::before{
  content:"";
  position:absolute;
  left:50%;
  top:14%;
  bottom:14%;
  width:1px;
  background:repeating-linear-gradient(to bottom,rgba(139,144,152,.8) 0 3px,transparent 3px 9px);
}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,28px);
  flex:0 1 auto;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(2px,.7vw,8px);
}
.nav-link{
  display:inline-block;
  padding:8px clamp(6px,1vw,11px) 9px;
  font-size:15px;
  font-weight:500;
  line-height:1.25;
  letter-spacing:.02em;
  white-space:nowrap;
  color:var(--paper);
  border-bottom:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-link:hover{
  color:var(--bronze);
  border-bottom-color:var(--bronze);
}
.nav-link[aria-current="page"]{
  color:var(--paper);
  border-bottom-color:var(--cinnabar);
  background:rgba(200,54,43,.18);
}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

/* 阅读进度 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  background:var(--bronze);
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
  z-index:2;
}

/* 菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:9px 12px;
  background:transparent;
  color:var(--paper);
  border:2px solid var(--paper);
  box-shadow:4px 4px 0 rgba(245,241,232,.22);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(245,241,232,.26);}
.nav-toggle:active{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(245,241,232,.26);}
.nav-toggle-bars{display:block;width:20px;}
.nav-toggle-bars span{
  display:block;
  height:2px;
  margin:4px 0;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle-bars span:nth-child(1){margin-top:0;}
.nav-toggle-bars span:nth-child(3){margin-bottom:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg);}
.nav-toggle-label{display:inline-block;line-height:1;}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:9px 16px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  line-height:1.25;
  letter-spacing:.02em;
  white-space:nowrap;
  cursor:pointer;
  border:2px solid var(--ink);
  background:var(--paper);
  color:var(--ink);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink);}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--ink);}

.btn-primary{
  background:var(--cinnabar);
  border-color:var(--cinnabar-deep);
  color:var(--paper);
  box-shadow:4px 4px 0 var(--cinnabar-deep);
}
.btn-primary:hover{background:#D4402F;box-shadow:6px 6px 0 var(--cinnabar-deep);}
.btn-primary:active{box-shadow:2px 2px 0 var(--cinnabar-deep);}

.btn-ghost{
  background:transparent;
  border-color:var(--paper);
  color:var(--paper);
  box-shadow:4px 4px 0 rgba(245,241,232,.22);
}
.btn-ghost:hover{background:rgba(245,241,232,.08);box-shadow:6px 6px 0 rgba(245,241,232,.22);}
.btn-ghost:active{box-shadow:2px 2px 0 rgba(245,241,232,.22);}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:var(--paper);
  border-top:2px solid var(--cinnabar);
  padding:clamp(38px,5.5vw,70px) 0 clamp(22px,3vw,32px);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(139,144,152,.14) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(139,144,152,.14) 1px,transparent 1px);
  background-size:var(--grid-cell) var(--grid-cell);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,64px);
}

.footer-brand{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:10px;
}
.footer-mark{
  display:grid;
  place-items:center;
  width:48px;
  height:48px;
  background:var(--cinnabar);
  color:var(--paper);
  border:2px solid var(--cinnabar-deep);
  box-shadow:4px 4px 0 var(--cinnabar-deep);
  font-family:var(--font-display);
  font-weight:900;
  font-size:26px;
  line-height:1;
}
.footer-brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.2;
  letter-spacing:.02em;
}
.footer-brand-tagline{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.08em;
  color:var(--grey);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col{min-width:0;}
.footer-col-title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(185,138,46,.42);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  line-height:1.4;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--bronze);
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer-link{
  display:inline-block;
  padding:3px 0;
  font-size:15px;
  line-height:1.6;
  color:rgba(245,241,232,.82);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover{
  color:var(--paper);
  border-bottom-color:var(--cinnabar);
}

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:flex-start;
  gap:12px 32px;
  margin-top:clamp(30px,4vw,56px);
  padding-top:20px;
  border-top:1px solid rgba(139,144,152,.3);
}
.footer-contact{
  max-width:72ch;
  font-size:14px;
  line-height:1.8;
  color:rgba(245,241,232,.78);
}
.footer-legal{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.8;
  letter-spacing:.06em;
  color:var(--grey);
}

/* ---------- 7. 通用版式与组件 ---------- */
.container{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(44px,6.5vw,100px);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 40px;
  margin-bottom:clamp(22px,3vw,44px);
}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(28px,3.6vw,52px);
  line-height:1.12;
  letter-spacing:.01em;
}
.section-note{
  max-width:46ch;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-soft);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.4;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cinnabar);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--cinnabar);
  flex:0 0 auto;
}

.index-num{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.5;
  letter-spacing:.08em;
  color:var(--bronze);
}

.prose{
  max-width:var(--measure);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
}
.prose h2{
  margin:1.6em 0 .6em;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(26px,3vw,40px);
  line-height:1.2;
  letter-spacing:.01em;
}
.prose h2:first-child{margin-top:0;}
.prose h3{
  margin:1.5em 0 .5em;
  font-family:var(--font-display);
  font-weight:700;
  font-size:20px;
  line-height:1.4;
}
.prose p{margin-bottom:1.1em;}
.prose p:last-child{margin-bottom:0;}
.prose ul,
.prose ol{
  margin:0 0 1.1em;
  padding-left:1.4em;
  list-style:disc;
}
.prose ol{list-style:decimal;}
.prose li{margin-bottom:.45em;}
.prose a{
  color:var(--sky);
  border-bottom:1px solid rgba(44,125,191,.45);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.prose a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar);}
.prose strong{font-weight:700;}

.text-link{
  color:var(--sky);
  border-bottom:1px solid rgba(44,125,191,.45);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.text-link:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar);}

.flow > * + *{margin-top:var(--flow,1.1em);}

.divider{
  height:1px;
  border:0;
  background:var(--grey);
  opacity:.35;
}

/* 面板 */
.panel{
  padding:clamp(20px,2.4vw,34px);
  background:var(--paper);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.panel--ink{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--ink);
  box-shadow:6px 6px 0 var(--cinnabar);
}
.panel--blue{
  background:var(--tibet-blue);
  color:var(--paper);
  border-color:var(--ink);
  box-shadow:6px 6px 0 var(--bronze);
}

/* 网格 */
.grid{
  display:grid;
  gap:clamp(16px,2.2vw,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:minmax(0,3fr) minmax(0,6fr) minmax(0,3fr);}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  border:1px solid currentColor;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cinnabar);
}
.tag--gold{color:var(--bronze);}
.tag--blue{color:var(--sky);}
.tag--live{color:var(--teal);}

/* 面包屑 */
.breadcrumb{padding-top:18px;}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.08em;
  color:var(--ink-soft);
}
.breadcrumb-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.breadcrumb-link{
  color:var(--ink-soft);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.breadcrumb-link:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar);}
.breadcrumb-sep{color:var(--grey);}
.breadcrumb-current{color:var(--cinnabar);}

/* 坐标刻度带钩子 */
.axis-rail{
  position:relative;
  padding-left:var(--axis-w);
}
.axis-rail::before{
  content:"";
  position:absolute;
  left:calc(var(--axis-w) - 1px);
  top:0;
  bottom:0;
  width:1px;
  background:var(--grey);
  opacity:.4;
}

/* 图片容器 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--tibet-blue);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(245,241,232,.10) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(245,241,232,.10) 1px,transparent 1px);
  background-size:32px 32px;
  pointer-events:none;
}
.media-frame img,
.media-frame__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--hero{aspect-ratio:21 / 9;}
.media-frame--wide{aspect-ratio:16 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame__caption{
  position:relative;
  z-index:2;
  margin-top:0;
  padding:10px 14px;
  background:rgba(11,13,16,.86);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.04em;
  border-top:2px solid var(--cinnabar);
}

/* 无障碍工具 */
.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  margin:-1px;
  padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* 显现与选中态 */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .38s var(--ease),transform .38s var(--ease);
}
html.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}
[role="tab"]{cursor:pointer;}
[role="tab"].is-active{color:var(--cinnabar);}
[role="tabpanel"][hidden]{display:none;}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1180px){
  .nav-link{padding-inline:7px;font-size:14px;}
  .nav-actions .btn-ghost{display:none;}
}

@media (max-width:980px){
  .header-inner{min-height:72px;gap:12px;padding-block:12px;}
  .header-axis{display:none;}
  .brand-tagline{font-size:10px;letter-spacing:.1em;}
  .nav-toggle{display:inline-flex;}

  .site-nav{
    display:none;
    position:absolute;
    left:0;
    right:0;
    top:100%;
    z-index:95;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:min(78vh,560px);
    overflow-y:auto;
    padding:16px var(--gutter) 22px;
    background:var(--ink);
    border-top:2px solid var(--cinnabar);
    border-bottom:2px solid var(--cinnabar);
    box-shadow:0 16px 0 rgba(11,13,16,.32);
  }
  .site-nav[data-open]{display:flex;}

  .nav-list{
    flex-direction:row;
    flex-wrap:nowrap;
    gap:6px;
    overflow-x:auto;
    padding-bottom:10px;
    scroll-snap-type:x proximity;
    -webkit-overflow-scrolling:touch;
  }
  .nav-list > li{flex:0 0 auto;}
  .nav-link{
    font-size:16px;
    padding:9px 13px;
    border:1px solid rgba(245,241,232,.2);
    scroll-snap-align:start;
  }
  .nav-link[aria-current="page"]{
    border-color:var(--cinnabar);
    background:rgba(200,54,43,.2);
  }

  .nav-actions{
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    margin-top:12px;
    padding-top:14px;
    border-top:1px solid rgba(139,144,152,.3);
  }
  .nav-actions .btn,
  .nav-actions .btn-ghost{display:inline-flex;width:100%;}

  .footer-top{grid-template-columns:minmax(0,1fr);}
  .grid--asym{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:760px){
  body{font-size:16px;line-height:1.8;}
  .brand-mark{width:36px;height:36px;font-size:20px;}
  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr);}
  .footer-meta{flex-direction:column;}
  .footer-legal{font-size:11px;}
  .axis-rail{padding-left:36px;}
  .axis-rail::before{left:35px;}
}

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