/* ==========================================================================
   腾达会真人站 · /assets/site.css
   共享外壳：侧边轨道导航 + 海报分层页脚 + 印刷叠层组件
   ========================================================================== */

:root{
  --night:#0B1B3A;
  --night-2:#142A52;
  --cyan:#22D3EE;
  --lime:#C7F53B;
  --grass:#1F7A5A;
  --paper:#F2F7FF;
  --steel:#8FA3C4;
  --ink:#05101F;
  --warn:#FF7A45;
  --text-soft:#C6D4EA;
  --line:rgba(143,163,196,.26);
  --line-strong:rgba(143,163,196,.45);
  --cyan-line:rgba(34,211,238,.5);
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --rail-w:92px;
  --rail-w-open:272px;
  --print-shadow:4px 4px 0 rgba(5,16,31,.6);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1280px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--night);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(120% 78% at 84% -8%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(92% 68% at 4% 108%, rgba(31,122,90,.20), transparent 66%),
    repeating-linear-gradient(115deg, rgba(143,163,196,.055) 0 1px, transparent 1px 46px);
}
img,svg,picture,video{max-width:100%;display:block}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
::selection{background:var(--lime);color:var(--ink)}

/* ---------- 中文排版 ---------- */
.display{font-family:var(--font-display);font-weight:900;line-height:1.03;letter-spacing:-.02em;color:var(--paper)}
.display--xl{font-size:clamp(42px,8.6vw,132px)}
.display--lg{font-size:clamp(32px,5.4vw,88px)}
.display--md{font-size:clamp(24px,3.4vw,56px)}
.display--sm{font-size:clamp(20px,2.2vw,36px)}
.num,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.22em;color:var(--cyan);text-transform:uppercase}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--lime);flex:0 0 auto}
.lede{font-size:17px;line-height:1.8;color:var(--text-soft);max-width:38em}
.annotation{writing-mode:vertical-rl;font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;color:var(--steel)}
.prose{max-width:42em;font-size:16px;line-height:1.85;color:var(--text-soft)}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{margin:1.6em 0 .6em;color:var(--paper);font-weight:900;line-height:1.25}
.prose strong{color:var(--paper)}
.prose ul,.prose ol{margin:1em 0;padding-left:1.35em;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.45em}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:20px}
.site-main{display:block;position:relative;z-index:1}
.section{position:relative;padding-block:clamp(56px,8vw,112px)}
.section--tight{padding-block:clamp(32px,5vw,64px)}
.section--paper{background:var(--paper);color:var(--night)}
.section--paper .display,.section--paper .prose,.section--paper .prose h2,.section--paper .prose h3,.section--paper .prose strong{color:var(--night)}
.section--paper .lede,.section--paper .prose{color:#22304A}
.section--paper .eyebrow{color:var(--grass)}
.section--paper .eyebrow::before{background:var(--grass)}
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:clamp(24px,4vw,48px)}
.rule{height:1px;border:0;margin:0;background:linear-gradient(90deg,rgba(34,211,238,.6),rgba(143,163,196,.12) 62%,transparent)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 12}
@media (max-width:767px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
  .span-3,.span-4{grid-column:span 3}
  .span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 6}
}
@media (min-width:768px){
  .span-3{grid-column:span 3}
  .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-9{grid-column:span 9}
  .span-12{grid-column:span 12}
  .start-2{grid-column-start:2}
  .start-3{grid-column-start:3}
  .start-7{grid-column-start:7}
  .start-8{grid-column-start:8}
}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--paper);
  --btn-line:var(--line-strong);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  font-size:14px;
  font-weight:700;
  line-height:1;
  letter-spacing:.06em;
  color:var(--btn-fg);
  background:var(--btn-bg);
  border:1px solid var(--btn-line);
  box-shadow:3px 3px 0 rgba(5,16,31,.5);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{transform:translate(-1px,-1px);box-shadow:5px 5px 0 rgba(5,16,31,.55)}
.btn:active{transform:translate(1px,1px);box-shadow:1px 1px 0 rgba(5,16,31,.5)}
.btn--lime{--btn-bg:var(--lime);--btn-fg:var(--ink);--btn-line:#9ac21c}
.btn--cyan{--btn-bg:var(--cyan);--btn-fg:var(--ink);--btn-line:#0f92a5}
.btn--ghost{--btn-bg:rgba(34,211,238,.07);--btn-fg:var(--paper);--btn-line:var(--cyan-line)}
.btn--sm{padding:9px 14px;font-size:13px;letter-spacing:.04em}
.section--paper .btn--ghost{--btn-bg:transparent;--btn-fg:var(--night);--btn-line:rgba(11,27,58,.45)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  font-size:12px;
  font-weight:700;
  line-height:1.4;
  letter-spacing:.1em;
  color:var(--paper);
  background:var(--grass);
  border:1px solid rgba(242,247,255,.18);
}
.tag--cyan{background:var(--cyan);color:var(--ink);border-color:rgba(5,16,31,.2)}
.tag--lime{background:var(--lime);color:var(--ink);border-color:rgba(5,16,31,.2)}
.tag--warn{background:var(--warn);color:var(--ink);border-color:rgba(5,16,31,.2)}
.tag--outline{background:transparent;color:var(--cyan);border-color:var(--cyan-line)}

/* ---------- 卡片 / 数据 / 图片 ---------- */
.card{
  position:relative;
  padding:24px;
  background:var(--night-2);
  border:1px solid var(--line);
  box-shadow:var(--print-shadow);
}
.card--paper{background:var(--paper);color:var(--night);border-color:rgba(11,27,58,.18);box-shadow:4px 4px 0 rgba(5,16,31,.35)}
.card--accent{border-color:var(--cyan-line)}
.card__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--cyan);text-transform:uppercase}
.card--paper .card__label{color:var(--grass)}
.card__title{font-size:20px;font-weight:800;line-height:1.35;color:var(--paper)}
.card--paper .card__title{color:var(--night)}

.stat{display:flex;flex-direction:column;gap:8px;min-width:0}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(40px,6.4vw,72px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;
  color:var(--paper);
}
.stat__value--lime{color:var(--lime)}
.stat__value--cyan{color:var(--cyan)}
.stat__unit{font-family:var(--font-mono);font-size:.38em;font-weight:700;letter-spacing:.06em;margin-left:.24em;color:var(--steel)}
.stat__label{font-size:13px;letter-spacing:.1em;color:var(--steel)}
.section--paper .stat__value{color:var(--night)}
.section--paper .stat__value--lime{color:#69910a}
.section--paper .stat__value--cyan{color:#0b7d8c}
.section--paper .stat__label{color:#4a5a76}

.media{
  position:relative;
  overflow:hidden;
  background:linear-gradient(140deg,#0d2244,#05101F);
  border:1px solid var(--line);
  box-shadow:5px 5px 0 rgba(5,16,31,.6);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(34,211,238,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,211,238,.14) 1px,transparent 1px);
  background-size:40px 40px;
  opacity:.35;
  mix-blend-mode:screen;
}
.media--16x9{aspect-ratio:16/9}
.media--3x2{aspect-ratio:3/2}
.media--4x5{aspect-ratio:4/5}
.media--1x1{aspect-ratio:1/1}
.media--crop img{object-position:65% 30%}
.media__caption{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  padding:6px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ink);
  background:var(--lime);
}

/* ---------- 面包屑 / 表格 / 折叠问答 ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--steel)}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.breadcrumb a{color:var(--steel);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}
.breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:rgba(143,163,196,.55)}

.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);box-shadow:var(--print-shadow)}
.data-table{min-width:560px;font-size:14px}
.data-table th,.data-table td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
.data-table th{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--cyan);text-transform:uppercase;white-space:nowrap}
.data-table td{color:var(--text-soft)}
.data-table td.num{font-family:var(--font-mono);color:var(--paper)}
.section--paper .table-scroll{border-color:rgba(11,27,58,.16)}
.section--paper .data-table th{color:var(--grass)}
.section--paper .data-table th,.section--paper .data-table td{border-bottom-color:rgba(11,27,58,.14)}
.section--paper .data-table td{color:var(--night)}

.qa{background:rgba(20,42,82,.6);border:1px solid var(--line);box-shadow:3px 3px 0 rgba(5,16,31,.5)}
.qa+.qa{margin-top:12px}
.qa>summary{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:17px;
  font-weight:700;
  color:var(--paper);
  cursor:pointer;
  list-style:none;
}
.qa>summary::-webkit-details-marker{display:none}
.qa>summary::after{content:"+";font-family:var(--font-mono);font-size:18px;line-height:1;color:var(--lime)}
.qa[open]>summary::after{content:"–"}
.qa__body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-soft)}

/* ==========================================================================
   头部 · 移动端顶部条 + 抽屉
   ========================================================================== */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 16px;
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  background:var(--lime);
  border:1px solid var(--ink);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:none}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 16px;
  background:#0B1B3A;
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  background:rgba(143,163,196,.14);
  pointer-events:none;
}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--lime))}

.header-bar{display:flex;align-items:center;gap:10px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:36px;
  height:36px;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--ink);
  background:var(--lime);
  box-shadow:3px 3px 0 rgba(34,211,238,.45);
}
.brand-name{font-size:16px;font-weight:900;letter-spacing:.02em;white-space:nowrap;color:var(--paper)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-toggle{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:6px;
  width:44px;
  height:44px;
  padding:0 11px;
  background:rgba(34,211,238,.08);
  border:1px solid var(--cyan-line);
}
.nav-toggle span{display:block;height:2px;background:var(--paper);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.site-header[data-open="true"] .nav-toggle span:first-child{transform:translateY(4px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle span:last-child{transform:translateY(-4px) rotate(-45deg)}

.site-nav{
  position:fixed;
  top:0;
  bottom:0;
  left:0;
  z-index:70;
  width:min(84vw,340px);
  padding:84px 22px 28px;
  overflow-y:auto;
  background:linear-gradient(160deg,#142A52 0%,#0B1B3A 58%,#05101F 100%);
  border-right:1px solid var(--cyan-line);
  transform:translateX(-104%);
  transition:transform .36s var(--ease);
}
.site-header[data-open="true"] .site-nav{transform:translateX(0)}
.nav-note{margin-bottom:16px;font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;color:var(--steel)}
.nav-list{display:flex;flex-direction:column}
.nav-link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:16px 4px;
  color:var(--paper);
  border-bottom:1px dashed var(--line);
  transition:color .18s var(--ease);
}
.nav-index{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--cyan)}
.nav-label{font-size:20px;font-weight:800;letter-spacing:.01em}
.nav-link:hover .nav-label,.nav-link:hover .nav-index{color:var(--lime)}
.nav-link[aria-current="page"] .nav-label{color:var(--lime)}
.nav-link[aria-current="page"] .nav-index{padding:2px 6px;color:var(--ink);background:var(--lime)}
.nav-link[aria-current="page"]::before{content:"";position:absolute;left:-22px;top:0;bottom:0;width:4px;background:var(--lime)}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:65;
  width:100%;
  height:100%;
  background:rgba(5,16,31,.72);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease);
}
.site-header[data-open="true"] .nav-scrim{opacity:1;pointer-events:auto}
body.nav-open{overflow:hidden}

/* ==========================================================================
   头部 · 桌面端侧边轨道
   ========================================================================== */
@media (min-width:1024px){
  .site-header{
    position:fixed;
    inset-block:0;
    inset-inline:0 auto;
    width:var(--rail-w);
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:0;
    border-bottom:0;
    border-right:1px solid var(--line);
    background:linear-gradient(180deg,#0B1B3A 0%,#102449 54%,#08152E 100%);
    overflow:hidden;
    transition:width .34s var(--ease),box-shadow .3s var(--ease);
  }
  .site-header::before{
    content:"";
    position:absolute;
    top:0;
    bottom:0;
    right:0;
    width:2px;
    background:linear-gradient(180deg,var(--cyan),rgba(34,211,238,0) 42%,var(--lime));
    opacity:.5;
    pointer-events:none;
    z-index:2;
  }
  .site-header:hover,.site-header:focus-within{width:var(--rail-w-open);box-shadow:14px 0 44px rgba(5,16,31,.6)}

  .site-header .header-bar{display:block;padding:24px 0 0}
  .site-header .brand{flex-direction:column;align-items:center;gap:12px;padding:0 10px}
  .site-header:hover .brand,.site-header:focus-within .brand{flex-direction:row;gap:14px;padding-inline:20px}
  .site-header .brand-name{writing-mode:vertical-rl;font-size:12px;letter-spacing:.1em}
  .site-header:hover .brand-name,.site-header:focus-within .brand-name{writing-mode:horizontal-tb;font-size:15px;letter-spacing:.06em}

  .site-header .site-nav{
    position:static;
    width:auto;
    transform:none;
    padding:24px 0 0;
    flex:1 1 auto;
    min-height:0;
    overflow-y:auto;
    overflow-x:hidden;
    background:none;
    border:0;
    scrollbar-width:thin;
  }
  .site-nav::-webkit-scrollbar{width:4px}
  .site-nav::-webkit-scrollbar-thumb{background:rgba(34,211,238,.4)}
  .nav-note{display:none}
  .nav-list{padding:0 10px;gap:2px}
  .nav-link{
    flex-direction:column;
    align-items:center;
    gap:8px;
    padding:12px 4px;
    border-bottom:0;
    border-left:2px solid transparent;
  }
  .site-header:hover .nav-link,.site-header:focus-within .nav-link{
    flex-direction:row;
    align-items:center;
    gap:14px;
    padding:13px 16px;
  }
  .nav-label{writing-mode:vertical-rl;font-size:12px;letter-spacing:.18em}
  .site-header:hover .nav-label,.site-header:focus-within .nav-label{writing-mode:horizontal-tb;font-size:15px;letter-spacing:.06em}
  .nav-index{font-size:10px}
  .nav-link[aria-current="page"]{background:rgba(199,245,59,.07);border-left-color:var(--lime)}
  .nav-link[aria-current="page"]::before{display:none}
  .nav-link[aria-current="page"] .nav-index{padding:2px 5px}

  .site-header .header-actions{
    flex-direction:column;
    align-items:center;
    gap:12px;
    padding:18px 10px 24px;
    border-top:1px solid var(--line);
  }
  .site-header:hover .header-actions,.site-header:focus-within .header-actions{align-items:stretch;padding-inline:18px}
  .site-header .header-actions .btn{font-size:12px;padding:9px 10px;letter-spacing:.02em;width:100%}
  .nav-toggle,.nav-scrim{display:none}

  .skip-link{left:calc(var(--rail-w) + 12px)}
  .site-main{margin-left:var(--rail-w)}
  .site-footer{margin-left:var(--rail-w)}
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--ink);
  color:var(--text-soft);
  border-top:1px solid rgba(34,211,238,.35);
}
.site-footer::before{content:"";position:absolute;top:3px;left:0;right:0;height:1px;background:rgba(143,163,196,.2)}
.footer-inner{padding-block:clamp(44px,6vw,76px) 26px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px 28px}
.footer-col{min-width:0}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-name{font-size:15px}
.footer-tagline{max-width:32em;margin-bottom:10px;font-size:15px;line-height:1.8;color:var(--text-soft)}
.footer-note{font-family:var(--font-mono);font-size:12px;line-height:1.7;letter-spacing:.02em;color:var(--steel)}
.footer-heading{margin-bottom:14px;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--cyan)}
.footer-list{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-link{color:var(--text-soft);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.footer-link:hover{color:var(--lime);border-bottom-color:var(--lime)}
.footer-mono{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;color:var(--steel);overflow-wrap:anywhere}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(32px,5vw,54px);
  padding-top:18px;
  font-size:12px;
  color:var(--steel);
  border-top:1px solid var(--line);
}
@media (min-width:640px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1.25fr 1fr;gap:40px}
}

/* ==========================================================================
   滚动显现协议 + 动效降级
   ========================================================================== */
.js-anim [data-reveal]{
  opacity:0;
  transform:translate3d(0,22px,0);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.js-anim [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  .js-anim [data-reveal]{opacity:0;transform:none;transition:opacity .12s linear !important}
  .js-anim [data-reveal].is-visible{opacity:1;transform:none}
  .site-header{transition:none !important}
}

/* 容器内边距随宽度进阶 */
@media (min-width:768px){
  .container{padding-inline:32px}
  .site-header{padding-inline:24px}
}
@media (min-width:1024px){
  .container{padding-inline:48px}
}