/* =========================================================
   江南看台 · 全站共享样式 /assets/site.css
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}
summary{list-style:none}
summary::-webkit-details-marker{display:none}

:root{
  --ink-deep:#16333A;
  --ink-mid:#2C5058;
  --water:#7C9599;
  --mist:#F2F5F1;
  --paper:#FBFCFA;
  --cinnabar:#BE3A2B;
  --cinnabar-soft:#EBD3CD;
  --lime:#A8C63F;
  --lime-deep:#5E7A16;
  --hair:#D5DDD6;
  --carbon:#101C1B;

  --rail-w:236px;
  --bar-h:64px;
  --radius:4px;
  --shadow:0 1px 2px rgba(22,51,58,.06);
  --ease:cubic-bezier(.2,.7,.3,1);

  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --t-1:12px; --t-2:14px; --t-3:16px; --t-4:20px;
  --t-5:28px; --t-6:44px; --t-7:72px;
}

/* ---------- 中文排版基线 ---------- */
html{scroll-behavior:smooth}
body{
  background-color:var(--mist);
  background-image:
    repeating-linear-gradient(to right, rgba(22,51,58,.05) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, rgba(22,51,58,.035) 0 1px, transparent 1px 64px);
  background-position:0 0;
  color:var(--carbon);
  font-family:var(--sans);
  font-size:var(--t-3);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  word-break:break-word;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;letter-spacing:-.01em;line-height:1.25;color:var(--ink-deep)}
h5{font-family:var(--sans);font-weight:500;letter-spacing:.04em;color:var(--ink-mid)}

:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px;border-radius:2px}
.site-header :focus-visible,
.site-footer :focus-visible{outline:2px solid var(--lime);outline-offset:3px}

/* ---------- 通用容器与文本 ---------- */
.wrap{width:100%;max-width:1120px;margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.prose{max-width:36em;font-size:var(--t-3);line-height:1.8;color:var(--ink-mid)}
.prose p+p{margin-top:.85em}
.lede{max-width:34em;font-size:var(--t-4);line-height:1.7;color:var(--ink-mid)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--water);text-transform:uppercase}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--sans);font-size:13px;font-weight:500;letter-spacing:.04em;
  line-height:1.2;background:var(--paper);color:var(--ink-deep);
  transition:background 140ms var(--ease),color 140ms var(--ease),border-color 140ms var(--ease),transform 90ms var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--cinnabar);color:#fff;box-shadow:var(--shadow)}
.btn--primary:hover{background:#a8301f}
.btn--ghost{border-color:var(--ink-mid);color:var(--ink-deep);background:transparent}
.btn--ghost:hover{background:var(--ink-deep);border-color:var(--ink-deep);color:var(--mist)}
.btn--lime{background:var(--lime);color:var(--carbon)}
.btn--lime:hover{background:#b8d453}
.btn--sm{padding:7px 12px;font-size:12px}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--water)}
.crumbs li{display:inline-flex;align-items:center}
.crumbs li+li::before{content:"/";margin-right:8px;color:var(--hair)}
.crumbs a{color:var(--ink-mid);border-bottom:1px solid var(--hair);padding-bottom:1px}
.crumbs a:hover{color:var(--cinnabar);border-bottom-color:var(--cinnabar)}

/* ---------- 章节索引 ---------- */
.chapter{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;padding-top:14px;border-top:1px solid var(--hair)}
.chapter-index{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--cinnabar)}
.chapter-title{font-family:var(--serif);font-size:var(--t-4);color:var(--ink-deep)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--paper);border:1px solid var(--hair);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px 20px;
}
.card--home{background:var(--cinnabar-soft);border-color:#dfc3bd}
.card--stat{background:var(--paper);padding:14px 16px}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 9px;border-radius:2px;
  background:var(--mist);border:1px solid var(--hair);
  font-family:var(--sans);font-size:11px;font-weight:500;letter-spacing:.06em;color:var(--ink-mid);
}
.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--carbon)}
.tag--red{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.tag--soft{background:var(--cinnabar-soft);border-color:#dfc3bd;color:#8e2b1f}

/* ---------- 数字 ---------- */
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:var(--carbon)}
.num--score{display:inline-block;font-size:clamp(40px,9vw,72px);line-height:1;font-weight:600}
.num--mid{font-size:var(--t-5);line-height:1.1;font-weight:600}
.pct{font-family:var(--mono);font-style:italic;font-variant-numeric:tabular-nums;color:var(--lime-deep);letter-spacing:0}

/* ---------- 分栏 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:24px}
.split--5-4{grid-template-columns:1fr}
@media (min-width:820px){
  .split--5-4{grid-template-columns:5fr 4fr}
  .split--7-3{grid-template-columns:7fr 3fr}
}

/* ---------- 横向滚动长表 ---------- */
.table-scroll{overflow-x:auto;background:var(--paper);border:1px solid var(--hair);border-radius:var(--radius);box-shadow:var(--shadow)}
.table-scroll table{width:100%;min-width:560px;border-collapse:collapse}
.table-scroll th,.table-scroll td{padding:10px 14px;border-bottom:1px solid var(--hair);text-align:left;font-size:13px;line-height:1.5}
.table-scroll thead th{
  position:sticky;top:0;z-index:1;background:var(--mist);
  font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--ink-mid);
}
.table-scroll tbody th{position:sticky;left:0;z-index:2;background:var(--paper);font-weight:500;color:var(--ink-deep)}
.table-scroll td .num{font-size:14px}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--ink-mid);border:1px solid var(--hair);border-radius:var(--radius);
  box-shadow:var(--shadow);aspect-ratio:4/3;
}
.media-frame>img{width:100%;height:100%;object-fit:cover;filter:saturate(.94) contrast(1.02)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(155deg,rgba(22,51,58,.22),rgba(22,51,58,0) 58%);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--band{aspect-ratio:21/9}
.media-frame--empty{
  background-color:var(--ink-mid);
  background-image:repeating-linear-gradient(45deg,rgba(242,245,241,.14) 0 1px,transparent 1px 13px);
}
.media-caption{margin-top:8px;font-family:var(--sans);font-size:11.5px;letter-spacing:.02em;color:var(--water)}
.media-note{
  display:inline-block;margin-top:6px;font-family:var(--mono);font-size:11.5px;
  color:var(--cinnabar);transform:rotate(-1.2deg);
}

/* ---------- 可展开组 ---------- */
.fold{
  background:var(--paper);border:1px solid var(--hair);border-radius:var(--radius);
  box-shadow:var(--shadow);margin-bottom:10px;overflow:hidden;
}
.fold>summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 18px;cursor:pointer;
  font-family:var(--serif);font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--ink-deep);
  transition:background 140ms var(--ease);
}
.fold>summary::after{content:"+";font-family:var(--mono);font-size:16px;color:var(--cinnabar);line-height:1}
.fold>summary:hover{background:var(--mist)}
.fold[open]>summary{background:var(--mist);border-bottom:1px solid var(--hair)}
.fold[open]>summary::after{content:"–"}
.fold-body{padding:14px 18px;max-width:36em;font-size:14px;line-height:1.8;color:var(--ink-mid)}

/* =========================================================
   头部：左侧固定看台窄栏
   ========================================================= */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:300;
  padding:10px 16px;border-radius:var(--radius);
  background:var(--cinnabar);color:#fff;
  font-size:13px;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform 140ms var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:fixed;top:0;bottom:0;left:0;z-index:100;
  width:var(--rail-w);
  display:flex;flex-direction:column;
  background:var(--ink-deep);
  color:var(--mist);
  border-right:1px solid rgba(242,245,241,.1);
  box-shadow:inset -1px 0 0 rgba(255,255,255,.04);
  overflow-y:auto;
  overscroll-behavior:contain;
}

.header-brand{
  padding:22px 20px 18px;
  border-bottom:1px solid rgba(242,245,241,.14);
}
.brand-link{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  display:grid;place-items:center;
  width:32px;height:32px;flex:0 0 auto;
  background:var(--cinnabar);color:#fff;border-radius:2px;
  font-family:var(--serif);font-size:18px;font-weight:700;line-height:1;
}
.brand-name{font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.02em;color:#fff}
.brand-line{margin-top:10px;font-size:var(--t-2);line-height:1.6;color:rgba(242,245,241,.72)}
.device-hint{
  margin-top:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  color:var(--lime);
}
.alarm-toggle{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:14px;padding:7px 12px;
  border:1px solid rgba(242,245,241,.28);border-radius:999px;
  background:transparent;color:var(--mist);
  font-size:11px;font-weight:500;letter-spacing:.04em;line-height:1.2;
  transition:background 140ms var(--ease),color 140ms var(--ease),border-color 140ms var(--ease);
}
.alarm-dot{width:7px;height:7px;flex:0 0 auto;border-radius:50%;background:var(--water);transition:background 140ms var(--ease)}
.alarm-toggle:hover{border-color:rgba(242,245,241,.6)}
.alarm-toggle[aria-pressed="true"]{background:var(--lime);border-color:var(--lime);color:var(--carbon)}
.alarm-toggle[aria-pressed="true"] .alarm-dot{background:var(--carbon)}
.alarm-text--short{display:none}

.site-header[data-compact] .brand-line,
.site-header[data-compact] .device-hint{display:none}
.site-header[data-compact] .header-brand{padding:14px 20px 12px}

.nav-toggle{display:none}
.nav-toggle-icon{display:grid;gap:3px;width:14px}
.nav-toggle-icon i{display:block;height:1.5px;background:currentColor;border-radius:2px;transition:transform 160ms var(--ease),opacity 120ms var(--ease)}
.nav-toggle-text{font-size:11px;font-weight:500;letter-spacing:.1em}

.site-nav{
  flex:1 1 auto;
  display:flex;flex-direction:column;
  padding:14px 12px 18px;
}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-link{
  display:grid;
  grid-template-columns:24px 1fr;
  grid-template-rows:auto auto;
  column-gap:10px;
  padding:9px 10px;
  border-left:2px solid transparent;
  border-radius:var(--radius);
  transition:background 140ms var(--ease),border-color 140ms var(--ease);
}
.nav-index{
  grid-column:1;grid-row:1;
  font-family:var(--mono);font-size:11px;line-height:1.9;
  color:rgba(242,245,241,.45);
}
.nav-label{
  grid-column:2;grid-row:1;
  font-family:var(--sans);font-size:var(--t-2);font-weight:500;letter-spacing:.04em;
  color:rgba(242,245,241,.9);
  transition:color 140ms var(--ease);
}
.nav-hint{
  grid-column:2;grid-row:2;
  max-height:0;overflow:hidden;opacity:0;
  font-size:11px;line-height:1.6;color:rgba(242,245,241,.5);
  transition:max-height 180ms var(--ease),opacity 160ms var(--ease),margin-top 160ms var(--ease);
}
.nav-link:hover{background:rgba(242,245,241,.08)}
.nav-link:hover .nav-hint,
.nav-link:focus-visible .nav-hint{max-height:2.6em;opacity:1;margin-top:3px}
.nav-link:hover .nav-label{color:#fff}
.nav-link[aria-current="page"]{
  background:rgba(242,245,241,.1);
  border-left-color:var(--cinnabar);
}
.nav-link[aria-current="page"] .nav-label{color:#fff}
.nav-link[aria-current="page"] .nav-index{color:var(--lime)}

.nav-search{
  margin-top:auto;
  padding:14px 10px 0;
  border-top:1px solid rgba(242,245,241,.14);
}
.nav-search-title{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:rgba(242,245,241,.45);
}
.search-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}
.chip{
  display:inline-block;padding:3px 10px;
  border:1px solid rgba(242,245,241,.24);border-radius:999px;
  font-size:11px;font-weight:500;letter-spacing:.06em;line-height:1.6;
  color:rgba(242,245,241,.8);
  transition:background 130ms var(--ease),color 130ms var(--ease),border-color 130ms var(--ease);
}
.chip:hover,.chip:focus-visible{background:var(--lime);border-color:var(--lime);color:var(--carbon)}

.rail-progress{
  position:fixed;top:0;left:var(--rail-w);right:0;height:2px;z-index:120;
  pointer-events:none;background:rgba(22,51,58,.06);
}
.progress-fill{
  display:block;height:100%;width:100%;
  background:var(--cinnabar);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 80ms linear;
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}

/* =========================================================
   头部：移动端顶部条
   ========================================================= */
@media (max-width:1023px){
  .site-header{
    inset:0 0 auto 0;
    width:100%;
    min-height:var(--bar-h);
    flex-direction:row;
    align-items:center;
    gap:10px;
    padding:8px 14px;
    border-right:0;
    border-bottom:1px solid rgba(242,245,241,.14);
    overflow:visible;
  }
  .header-brand{
    display:flex;align-items:center;gap:10px;
    flex:1 1 auto;min-width:0;
    padding:0;border-bottom:0;
  }
  .brand-mark{width:28px;height:28px;font-size:16px}
  .brand-name{font-size:17px}
  .brand-line,.device-hint{display:none}
  .alarm-toggle{margin-top:0;padding:6px 10px;font-size:10.5px;flex:0 0 auto}
  .alarm-text--long{display:none}
  .alarm-text--short{display:inline}

  .nav-toggle{
    display:inline-flex;align-items:center;gap:7px;flex:0 0 auto;
    padding:8px 12px;
    border:1px solid rgba(242,245,241,.3);border-radius:999px;
    color:var(--mist);
    transition:background 130ms var(--ease),border-color 130ms var(--ease),color 130ms var(--ease);
  }
  .nav-toggle:hover{background:rgba(242,245,241,.12)}
  .nav-toggle[aria-expanded="true"]{background:var(--lime);border-color:var(--lime);color:var(--carbon)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

  .site-nav{
    position:fixed;top:var(--bar-h);left:0;right:0;z-index:99;
    display:block;flex:none;
    max-height:0;padding:0 14px;overflow:hidden;
    background:var(--ink-deep);
    border-bottom:1px solid rgba(242,245,241,.14);
    transition:max-height 200ms var(--ease),padding 200ms var(--ease);
  }
  .site-nav[data-open]{
    max-height:min(76vh,560px);
    overflow-y:auto;
    padding:12px 14px 18px;
    box-shadow:0 14px 24px rgba(16,28,27,.28);
  }
  .nav-list{display:grid;grid-template-columns:1fr 1fr;gap:6px}
  .nav-link{
    display:flex;align-items:baseline;gap:8px;
    padding:10px;
    background:rgba(242,245,241,.06);
    border-left:2px solid transparent;
  }
  .nav-hint{display:none}
  .nav-search{margin-top:14px;padding:12px 0 0}
  .rail-progress{left:0}
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  background:var(--ink-deep);
  color:var(--mist);
  padding:44px clamp(16px,4vw,40px) 24px;
  border-top:1px solid rgba(242,245,241,.12);
}
.foot-grid{
  max-width:1120px;margin-inline:auto;
  display:grid;grid-template-columns:1fr;gap:30px;
}
.foot-wordmark{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:.02em;color:#fff}
.foot-claim{margin-top:6px;font-size:13px;line-height:1.7;color:rgba(242,245,241,.7)}
.foot-icp{
  margin-top:16px;font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  color:var(--water);
}
.foot-title{
  margin-bottom:10px;
  font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.16em;
  color:var(--lime);
}
.foot-index ul{display:grid;grid-template-columns:1fr 1fr;gap:6px 16px}
.foot-index a{
  display:inline-block;
  font-size:13px;line-height:1.9;color:rgba(242,245,241,.82);
  border-bottom:1px solid transparent;
  transition:color 130ms var(--ease),border-color 130ms var(--ease);
}
.foot-index a:hover{color:#fff;border-bottom-color:var(--cinnabar)}
.contact-list{display:grid;gap:8px}
.contact-item{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:start}
.contact-label{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;line-height:1.9;
  color:var(--water);
}
.contact-value{font-size:12.5px;line-height:1.7;color:rgba(242,245,241,.88);word-break:break-all}
.contact-note{margin-top:12px;font-size:11.5px;line-height:1.7;color:rgba(242,245,241,.55)}
.foot-base{
  max-width:1120px;margin:30px auto 0;padding-top:16px;
  border-top:1px solid rgba(242,245,241,.14);
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 24px;
  font-size:11.5px;line-height:1.7;color:rgba(242,245,241,.55);
}
.foot-source,.foot-copy{margin:0}
.foot-copy{font-family:var(--mono);letter-spacing:.06em;color:var(--water)}

@media (min-width:760px){
  .foot-grid{grid-template-columns:1.3fr 1fr 1.3fr;gap:36px}
  .site-footer{padding-top:52px}
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}