/* =========================================================
   纯净看台 · 共享样式表 /assets/site.css
   分区：1 变量 2 重置 3 排版 4 头部轨道 5 页脚 6 通用组件
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --mist:#E9EBE7;
  --bamboo:#2F5D50;
  --ink:#16332C;
  --signal:#FF6A2B;
  --data:#2F6FED;
  --cell:#CBD8D1;
  --muted:#6C7A74;
  --haze:#FFDCC8;
  --grid:#A9B8B1;
  --card:#FFFFFF;

  --rail-w:128px;
  --topbar-h:58px;
  --maxw:1240px;

  --edge:2px solid var(--ink);
  --shadow:6px 8px 0 var(--ink);
  --shadow-sm:4px 4px 0 var(--ink);
  --shadow-xs:3px 3px 0 var(--ink);

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ol,ul,dl,dd,pre{margin:0;}
ul[class],ol[class]{list-style:none;padding-left:0;}
img,svg,video,canvas{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;padding:0;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}

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

:focus-visible{
  outline:3px solid var(--data);
  outline-offset:2px;
}
.site-header :focus-visible,
.site-footer :focus-visible{
  outline-color:var(--signal);
}

/* ---------- 3. 排版与页面基座 ---------- */
body{
  margin:0;
  padding-left:var(--rail-w);
  background-color:var(--mist);
  background-image:
    repeating-linear-gradient(115deg,rgba(169,184,177,.13) 0 1px,transparent 1px 36px),
    repeating-linear-gradient(25deg,rgba(169,184,177,.09) 0 1px,transparent 1px 62px);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.005em;
  min-height:100vh;
}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.15;
  color:var(--ink);
}
h1{font-size:clamp(28px,5vw,52px);}
h2{font-size:clamp(22px,3.4vw,36px);}
h3{font-size:clamp(18px,2.2vw,22px);letter-spacing:-.01em;}
h4{font-size:17px;letter-spacing:0;}

p{max-width:46em;}
strong{font-weight:700;}

a{text-decoration-thickness:2px;text-underline-offset:3px;}

hr{border:0;border-top:2px solid var(--grid);margin:36px 0;}

::selection{background:var(--haze);color:var(--ink);}

.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;
}

/* ---------- 4. 头部：侧边路径轨道 ---------- */
.skip-link{
  position:fixed;
  top:-90px;left:12px;
  z-index:200;
  padding:10px 16px;
  background:var(--mist);
  color:var(--ink);
  border:var(--edge);
  box-shadow:var(--shadow-xs);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px;}

.site-header{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  background:var(--ink);
  border-right:2px solid var(--ink);
  z-index:60;
}

.rail{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:22px 0 18px;
  gap:14px;
  overflow:hidden;
}

/* 品牌 */
.rail__brand{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding:0 14px 14px;
  text-decoration:none;
  border-bottom:1px solid rgba(233,235,231,.16);
}
.rail__mark{
  position:relative;
  display:block;
  flex:none;
  width:38px;height:38px;
  background:var(--bamboo);
  border:2px solid var(--mist);
}
.rail__mark::before{
  content:"";position:absolute;inset:6px;
  border:1px dashed rgba(233,235,231,.42);
}
.rail__mark::after{
  content:"";position:absolute;right:-6px;bottom:-6px;
  width:12px;height:12px;
  background:var(--signal);
  border:2px solid var(--ink);
}
.rail__name{
  writing-mode:vertical-rl;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:900;
  letter-spacing:.22em;
  color:var(--mist);
}

/* 导航 */
.site-nav{
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  overflow-x:hidden;
  padding:4px 0;
  scrollbar-width:thin;
  scrollbar-color:rgba(233,235,231,.3) transparent;
}
.site-nav::-webkit-scrollbar{width:6px;}
.site-nav::-webkit-scrollbar-thumb{background:rgba(233,235,231,.26);}

.site-nav__note{
  display:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:rgba(233,235,231,.5);
  margin:0 0 16px;
}

.site-nav__list{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:2px;
}
.site-nav__item{width:100%;}

.site-nav__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:7px;
  width:100%;
  padding:11px 6px;
  color:rgba(233,235,231,.7);
  text-decoration:none;
  border-left:3px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.site-nav__link:hover{
  color:var(--mist);
  background:rgba(233,235,231,.07);
}
.site-nav__link[aria-current="page"]{
  color:var(--mist);
  background:rgba(255,106,43,.14);
  border-left-color:var(--signal);
}
.site-nav__num{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:rgba(233,235,231,.42);
  font-variant-numeric:tabular-nums;
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--signal);}
.site-nav__label{
  writing-mode:vertical-rl;
  font-size:13px;
  font-weight:600;
  letter-spacing:.14em;
  line-height:1;
}

/* 轨道底 */
.rail__foot{
  flex:0 0 auto;
  padding:12px 10px 0;
  border-top:1px solid rgba(233,235,231,.16);
  display:flex;
  justify-content:center;
}
.rail__foot .status-chip{
  font-size:10px;
  letter-spacing:.02em;
  padding:5px 6px;
  gap:5px;
}

.status-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  max-width:100%;
  padding:5px 9px;
  background:var(--haze);
  color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:var(--shadow-xs);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.3;
  letter-spacing:.04em;
  white-space:nowrap;
}
.status-chip::before{
  content:"";
  flex:none;
  width:7px;height:7px;
  background:var(--signal);
  border-radius:50%;
}

/* 移动菜单按钮（桌面隐藏） */
.nav-toggle{display:none;}

/* 遮罩 */
.nav-scrim{
  position:fixed;
  inset:0;
  background:rgba(22,51,44,.55);
  z-index:65;
  border:0;
}

/* ---------- 移动 / 平板：轨道折叠为顶栏 + 抽屉 ---------- */
@media (max-width:899px){
  body{padding-left:0;padding-top:var(--topbar-h);}
  body[data-nav-open]{overflow:hidden;}

  .site-header{
    top:0;left:0;right:0;bottom:auto;
    width:100%;
    height:var(--topbar-h);
    border-right:0;
    border-bottom:2px solid var(--ink);
  }
  .rail{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    height:100%;
    padding:0 14px;
    overflow:visible;
  }
  .rail__brand{
    flex-direction:row;
    align-items:center;
    gap:10px;
    padding:0;
    border-bottom:0;
  }
  .rail__mark{width:26px;height:26px;border-width:2px;}
  .rail__mark::before{inset:5px;}
  .rail__mark::after{width:9px;height:9px;right:-5px;bottom:-5px;}
  .rail__name{
    writing-mode:horizontal-tb;
    font-size:15px;
    letter-spacing:.14em;
  }
  .rail__foot{display:none;}

  .site-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(84vw,330px);
    background:var(--ink);
    border-right:2px solid var(--ink);
    padding:74px 20px 28px;
    transform:translateX(-103%);
    transition:transform .3s var(--ease);
    overflow-y:auto;
    z-index:70;
    flex:none;
  }
  .site-nav[data-open]{transform:none;}
  .site-nav__note{display:block;}
  .site-nav__list{align-items:stretch;gap:0;}
  .site-nav__link{
    flex-direction:row;
    align-items:center;
    justify-content:flex-start;
    gap:14px;
    padding:15px 10px;
    border-left:3px solid transparent;
    border-bottom:1px solid rgba(233,235,231,.12);
  }
  .site-nav__label{
    writing-mode:horizontal-tb;
    font-size:16px;
    letter-spacing:.08em;
  }
  .site-nav__num{font-size:11px;}

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:9px;
    padding:9px 12px;
    background:var(--signal);
    color:var(--ink);
    border:2px solid var(--ink);
    box-shadow:var(--shadow-xs);
    font-family:var(--font-mono);
    font-size:12px;
    font-weight:700;
    letter-spacing:.06em;
    cursor:pointer;
    transition:transform .14s var(--ease),box-shadow .14s var(--ease);
  }
  .nav-toggle:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink);}
  .nav-toggle:active{transform:translate(1px,1px);box-shadow:1px 1px 0 var(--ink);}
  .nav-toggle__icon{
    position:relative;
    display:block;
    width:18px;height:12px;
    flex:none;
  }
  .nav-toggle__icon::before,
  .nav-toggle__icon::after{
    content:"";
    position:absolute;left:0;right:0;height:2px;
    background:var(--ink);
  }
  .nav-toggle__icon::before{top:0;box-shadow:0 5px 0 var(--ink);}
  .nav-toggle__icon::after{bottom:0;}
  .nav-toggle__text{white-space:nowrap;}
}

@media (min-width:900px){
  .nav-scrim{display:none;}
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(90deg,rgba(169,184,177,.10) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(169,184,177,.08) 0 1px,transparent 1px 64px);
  color:rgba(233,235,231,.78);
  border-top:2px solid var(--ink);
}

.site-footer__inner{
  display:grid;
  grid-template-columns:1fr;
  gap:38px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(38px,5vw,66px) clamp(16px,3vw,40px) clamp(28px,4vw,46px);
}

.site-footer__lead{max-width:38em;}
.site-footer__brand{
  font-family:var(--font-head);
  font-size:clamp(22px,3vw,30px);
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--mist);
  line-height:1.2;
}
.site-footer__brand::after{
  content:"";
  display:block;
  width:44px;height:3px;
  margin-top:12px;
  background:var(--signal);
}
.site-footer__tagline{
  margin-top:16px;
  font-size:15px;
  line-height:1.8;
  color:rgba(233,235,231,.66);
  max-width:26em;
}
.site-footer__chiprow{margin-top:20px;}

.site-footer__nav{
  display:grid;
  grid-template-columns:1fr;
  gap:28px 24px;
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--signal);
  margin:0;
}
.footer-col__list{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:14px;
}
.footer-col__list a{
  display:inline-block;
  font-size:14.5px;
  color:rgba(233,235,231,.76);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-col__list a:hover{
  color:var(--mist);
  border-bottom-color:var(--signal);
}

.site-footer__legal{
  border-top:1px solid rgba(169,184,177,.28);
}
.site-footer__legal-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:22px clamp(16px,3vw,40px) 34px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 30px;
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1.95;
  letter-spacing:.02em;
  color:rgba(233,235,231,.6);
}
.legal-line{margin:0;max-width:none;}
.legal-line--wide{flex-basis:100%;color:rgba(233,235,231,.46);}
.legal-key{
  display:inline-block;
  margin-right:9px;
  color:var(--signal);
  letter-spacing:.1em;
}

@media (min-width:620px){
  .site-footer__nav{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (min-width:900px){
  .site-footer__inner{
    grid-template-columns:minmax(230px,1fr) 2.15fr;
    gap:26px 52px;
    align-items:start;
  }
}

/* ---------- 6. 通用组件 ---------- */
.site-main{
  padding-top:clamp(26px,4vw,52px);
  padding-bottom:clamp(48px,6vw,88px);
  min-height:60vh;
}

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,40px);
}

/* 面包屑 */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  margin-bottom:24px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}
.crumb a{
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid var(--grid);
}
.crumb a:hover{color:var(--bamboo);border-bottom-color:var(--signal);}
.crumb [aria-current="page"]{color:var(--bamboo);}
.crumb__sep{color:var(--grid);}

/* 索引标签与指标 */
.kicker{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--muted);
}
.stat-num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,42px);
  font-weight:600;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--bamboo);
  font-variant-numeric:tabular-nums;
}
.stat-unit{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:.08em;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:46px;
  padding:11px 20px;
  background:var(--card);
  color:var(--ink);
  border:var(--edge);
  box-shadow:var(--shadow-sm);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .14s var(--ease),box-shadow .14s var(--ease),background-color .18s var(--ease);
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--ink);}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--ink);}
.btn--signal{background:var(--signal);color:var(--ink);}
.btn--ink{background:var(--bamboo);color:var(--mist);}
.btn--ghost{
  background:transparent;
  color:var(--bamboo);
  border-color:var(--bamboo);
  box-shadow:none;
}
.btn--ghost:hover{
  background:var(--cell);
  border-color:var(--ink);
  color:var(--ink);
  box-shadow:var(--shadow-sm);
}

/* 模块卡 */
.panel{
  position:relative;
  background:var(--card);
  border:var(--edge);
  box-shadow:var(--shadow);
  padding:clamp(20px,2.6vw,30px);
}
.panel::after{
  content:"";
  position:absolute;
  top:-2px;right:-2px;
  width:38px;height:2px;
  background:var(--signal);
}
.panel--cell{background:var(--cell);}
.panel--ink{background:var(--ink);color:var(--mist);}
.panel--ink .panel__title,
.panel--ink h2,
.panel--ink h3{color:var(--mist);}
.panel--tight{padding:clamp(16px,2vw,20px);}

/* 芯片 */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  background:var(--mist);
  color:var(--bamboo);
  border:1.5px solid var(--bamboo);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}
.chip--data{border-color:var(--data);color:var(--data);}
.chip--signal{background:var(--haze);border-color:var(--ink);color:var(--ink);}

/* 栅格 */
.grid{display:grid;gap:16px;grid-template-columns:minmax(0,1fr);}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1080px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
  .grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}
}
.grid--gap-lg{gap:24px;}

/* 筛选按钮组 */
.filters{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:0 0 26px;
}
.filter-btn{
  padding:8px 14px;
  min-height:40px;
  background:var(--card);
  color:var(--bamboo);
  border:var(--edge);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:background-color .18s var(--ease),box-shadow .14s var(--ease),color .18s var(--ease);
}
.filter-btn:hover{background:var(--cell);color:var(--ink);}
.filter-btn[aria-pressed="true"]{
  background:var(--haze);
  color:var(--ink);
  box-shadow:var(--shadow-xs);
}

/* 图片占位容器 */
.figure{
  position:relative;
  display:flex;
  flex-direction:column;
  margin:0;
  background:var(--card);
  border:var(--edge);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.figure__media{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16 / 9;
  object-fit:cover;
  background:
    linear-gradient(135deg,var(--cell) 0%,var(--mist) 55%,var(--cell) 100%);
}
.figure--wide .figure__media{aspect-ratio:21 / 9;}
.figure--tall .figure__media{aspect-ratio:4 / 5;}
.figure--square .figure__media{aspect-ratio:1 / 1;}
.figure__cap{
  padding:10px 14px;
  border-top:1px solid var(--grid);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.05em;
  color:var(--muted);
}
.figure::before{
  content:"";
  position:absolute;
  top:10px;left:10px;
  width:22px;height:9px;
  border-top:2px solid var(--signal);
  border-left:2px solid var(--signal);
  pointer-events:none;
  z-index:2;
}

/* 路径节点行（供页面扩展） */
.axis{
  position:relative;
  padding-left:26px;
}
.axis::before{
  content:"";
  position:absolute;
  left:7px;top:6px;bottom:6px;
  width:2px;
  background:var(--bamboo);
}
.axis__node{
  position:relative;
  padding:0 0 22px;
}
.axis__node::before{
  content:"";
  position:absolute;
  left:-24px;top:9px;
  width:11px;height:11px;
  background:var(--mist);
  border:2px solid var(--bamboo);
}
.axis__node:last-child{padding-bottom:0;}
.axis__node--on::before{background:var(--signal);border-color:var(--ink);}

/* 数据行 */
.datarow{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
  border-bottom:1px solid var(--grid);
  font-family:var(--font-mono);
  font-size:13px;
  font-variant-numeric:tabular-nums;
}
.datarow:last-child{border-bottom:0;}

/* 入场协议 */
[data-reveal]{transition:opacity .45s var(--ease),transform .45s var(--ease);}
[data-reveal="out"]{opacity:0;transform:translateY(4px);}

/* 降级动效 */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal="out"]{opacity:0;transform:none;}
  .site-nav{transition:none;}
}