/* ============================================================
   旺财官网 · 共享样式表 /assets/site.css
   侧边轨道导航 + Bento 画布 + 近单色层次
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd,table{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
strong,b{font-weight:700}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#1A1A1A;
  --ink-deep:#0E0E0E;
  --charcoal:#33322F;
  --mid:#5C5852;
  --sand:#F0EBE0;
  --paper:#FAF8F3;
  --gold:#F5A623;
  --gold-soft:#FBE0AE;
  --copper:#2E8B74;
  --copper-soft:#DCEBE4;
  --alarm:#B4441E;
  --hair:rgba(245,166,35,.35);
  --hair-2:rgba(26,26,26,.12);
  --hair-3:rgba(240,235,224,.12);
  --rail-w:104px;
  --topbar-h:58px;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Serif SC","Source Han Serif SC","Songti SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
  --sp-1:48px;
  --sp-2:80px;
  --sp-3:120px;
}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  background-color:var(--sand);
  background-image:
    repeating-linear-gradient(90deg, rgba(26,26,26,.05) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg, rgba(26,26,26,.035) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(108deg, rgba(245,166,35,.06) 0 1px, transparent 1px 240px);
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:768px){ body{font-size:16.5px} }
@media (min-width:1024px){ body{padding-left:var(--rail-w);font-size:17px} }
body.is-locked{overflow:hidden}

#main-content{display:block;scroll-margin-top:var(--topbar-h)}
@media (min-width:1024px){ #main-content{scroll-margin-top:0} }
[data-chapter]{scroll-margin-top:calc(var(--topbar-h) + 20px)}
@media (min-width:1024px){ [data-chapter]{scroll-margin-top:40px} }

:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ---------- 4. 排版与文本工具 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(40px,8vw,104px);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--ink);
}
.title{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(25px,3.2vw,40px);
  line-height:1.22;
  letter-spacing:-.01em;
}
.lede{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  color:var(--charcoal);
  max-width:40ch;
}
.kicker{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--mid);
  font-variant-numeric:tabular-nums;
}
.numeral{
  font-family:var(--font-mono);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  color:var(--ink);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--mid)}
.rule{height:1px;background:var(--hair);border:0}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 5. 滚动显现 ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  will-change:opacity,transform;
}
.js-ready [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 6. 侧边轨道头 ---------- */
.site-rail{
  position:sticky;
  top:0;
  left:0;
  right:0;
  z-index:80;
  display:flex;
  flex-direction:row;
  align-items:center;
  gap:10px;
  height:var(--topbar-h);
  padding:0 14px;
  background:var(--ink-deep);
  color:var(--sand);
  border-bottom:1px solid rgba(245,166,35,.22);
}
@media (min-width:1024px){
  .site-rail{
    position:fixed;
    inset:0 auto 0 0;
    right:auto;
    width:var(--rail-w);
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:28px 10px 22px;
    border-bottom:0;
    border-right:1px solid rgba(245,166,35,.22);
  }
}

.skip-link{
  position:fixed;
  top:-120px;
  left:12px;
  z-index:140;
  padding:10px 18px;
  background:var(--gold);
  color:var(--ink-deep);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}
@media (min-width:1024px){ .skip-link{left:calc(var(--rail-w) + 16px)} }

.read-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
  z-index:120;
}
@media (min-width:1024px){ .read-progress{left:var(--rail-w)} }

/* 品牌 */
.brand{
  order:1;
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 auto;
  min-width:0;
}
.brand__seal{
  flex:0 0 auto;
  width:30px;
  height:30px;
  display:grid;
  place-items:center;
  border:1px solid var(--gold);
  color:var(--gold);
  background:linear-gradient(160deg,rgba(245,166,35,.2),rgba(245,166,35,0));
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;min-width:0;line-height:1.2}
.brand__name{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--sand);
}
.brand__line{
  font-size:10.5px;
  letter-spacing:.12em;
  color:rgba(240,235,224,.5);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
@media (min-width:1024px){
  .brand{flex:0 0 auto;flex-direction:column;align-items:center;gap:10px;text-align:center}
  .brand__seal{width:44px;height:44px;font-size:20px}
  .brand__name{font-size:14px;letter-spacing:.2em;color:var(--sand)}
  .brand__line{font-size:10px;letter-spacing:.04em;white-space:normal;line-height:1.5;color:rgba(240,235,224,.42)}
}

/* 汉堡按钮 */
.nav-toggle{
  order:3;
  position:relative;
  z-index:3;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border:1px solid var(--hair);
  color:var(--sand);
  font-family:var(--font-display);
  font-size:12px;
  letter-spacing:.16em;
  transition:border-color .3s var(--ease),color .3s var(--ease),background-color .3s var(--ease);
}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:var(--gold);color:var(--gold)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:1px;background:var(--gold);transition:transform .3s var(--ease),opacity .3s var(--ease)}
.site-rail[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-rail[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-rail[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
@media (min-width:1024px){ .nav-toggle{display:none} }

/* 导航面板：移动端抽屉 */
.rail__nav{
  order:4;
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:2;
  width:min(86vw,340px);
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:76px 22px 28px;
  background:var(--ink-deep);
  color:var(--sand);
  border-right:1px solid var(--hair);
  overflow-y:auto;
  transform:translateX(-102%);
  visibility:hidden;
  transition:transform .42s var(--ease),visibility .42s var(--ease);
}
.site-rail[data-open] .rail__nav{transform:none;visibility:visible}
@media (min-width:1024px){
  .rail__nav{
    order:2;
    position:static;
    transform:none;
    visibility:visible;
    width:auto;
    padding:0;
    margin-top:26px;
    background:none;
    border-right:0;
    overflow:visible;
    gap:8px;
  }
}

.rail__hint{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(240,235,224,.4);
}
@media (min-width:1024px){ .rail__hint{display:none} }

.rail__list{display:flex;flex-direction:column;gap:2px}
.rail__link{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:12px 6px;
  border-bottom:1px solid rgba(240,235,224,.08);
  box-shadow:inset 2px 0 0 transparent;
  transition:color .3s var(--ease),background-color .3s var(--ease),box-shadow .3s var(--ease);
}
.rail__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  min-width:22px;
  color:rgba(245,166,35,.72);
  font-variant-numeric:tabular-nums;
}
.rail__label{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:500;
  letter-spacing:.06em;
  color:rgba(240,235,224,.86);
}
.rail__link:hover,.rail__link:focus-visible{background:rgba(245,166,35,.08)}
.rail__link:hover .rail__label,.rail__link:focus-visible .rail__label{color:var(--gold)}
.rail__link[aria-current="page"]{
  box-shadow:inset 2px 0 0 var(--gold);
  background:linear-gradient(90deg,rgba(245,166,35,.18),rgba(245,166,35,0));
}
.rail__link[aria-current="page"] .rail__label{color:var(--gold)}
@media (min-width:1024px){
  .rail__list{gap:6px}
  .rail__link{
    flex-direction:column;
    align-items:center;
    gap:3px;
    padding:9px 4px;
    border-bottom:0;
    text-align:center;
  }
  .rail__num{min-width:0;font-size:10px}
  .rail__label{font-size:12.5px;letter-spacing:.1em;white-space:nowrap}
}

.rail__foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid rgba(240,235,224,.1);
}
.rail__service{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.9;
  color:rgba(240,235,224,.6);
}
@media (min-width:1024px){ .rail__foot{display:none} }

/* 工具区 */
.rail__utility{
  order:2;
  position:relative;
  z-index:3;
  display:flex;
  align-items:center;
  gap:12px;
}
@media (min-width:1024px){
  .rail__utility{order:3;flex-direction:column;align-items:stretch;gap:10px;margin-top:auto}
}
.toc-trigger{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 10px;
  border:1px solid var(--hair);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.toc-trigger:hover,.toc-trigger:focus-visible{background:rgba(245,166,35,.14);border-color:var(--gold);color:var(--gold)}
.toc-trigger[aria-expanded="true"]{background:var(--gold);border-color:var(--gold);color:var(--ink-deep)}
.toc-trigger__dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:0 0 auto}
.toc-trigger[aria-expanded="true"] .toc-trigger__dot{background:var(--ink-deep)}
.toc-trigger__text{white-space:nowrap}
@media (min-width:1024px){
  .toc-trigger{justify-content:center;font-size:10.5px;letter-spacing:.1em;padding:9px 4px}
}
.rail__meta{
  display:none;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.04em;
  line-height:1.6;
  color:rgba(240,235,224,.5);
  text-align:center;
}
@media (min-width:1024px){ .rail__meta{display:block} }

/* 迷你目录面板 */
.toc-panel{
  order:5;
  position:fixed;
  top:var(--topbar-h);
  left:0;
  right:0;
  z-index:4;
  max-height:72vh;
  overflow-y:auto;
  padding:20px 18px 24px;
  background:var(--paper);
  color:var(--ink);
  border-bottom:1px solid var(--hair);
  transform:translateY(-104%);
  visibility:hidden;
  transition:transform .42s var(--ease),visibility .42s var(--ease);
}
.toc-panel[data-open]{transform:none;visibility:visible}
@media (min-width:1024px){
  .toc-panel{
    top:0;
    bottom:0;
    right:auto;
    left:var(--rail-w);
    width:340px;
    max-height:none;
    padding:34px 26px;
    border-bottom:0;
    border-right:1px solid var(--hair);
    transform:translateX(-104%);
  }
}
.toc-panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:14px;
  margin-bottom:14px;
  border-bottom:1px solid var(--hair-2);
}
.toc-panel__kicker{font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--mid)}
.toc-panel__close{
  padding:4px 8px;
  border:1px solid var(--hair-2);
  font-family:var(--font-display);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mid);
  transition:color .3s var(--ease),border-color .3s var(--ease);
}
.toc-panel__close:hover,.toc-panel__close:focus-visible{color:var(--ink);border-color:var(--gold)}
.toc-list{display:flex;flex-direction:column}
.toc-list__link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 8px 11px 12px;
  border-left:2px solid transparent;
  font-family:var(--font-display);
  font-size:14px;
  line-height:1.5;
  color:var(--charcoal);
  transition:color .3s var(--ease),background-color .3s var(--ease),border-color .3s var(--ease);
}
.toc-list__link:hover,.toc-list__link:focus-visible{background:rgba(245,166,35,.1);color:var(--ink)}
.toc-list__link[aria-current="true"]{
  border-left-color:var(--gold);
  background:linear-gradient(90deg,rgba(245,166,35,.18),rgba(245,166,35,0));
  color:var(--ink);
}
.toc-list__num{flex:0 0 auto;font-family:var(--font-mono);font-size:11px;color:var(--gold);font-variant-numeric:tabular-nums}
.toc-list__text{flex:1 1 auto}
.toc-panel__empty{font-size:13px;line-height:1.9;color:var(--mid)}
.toc-panel__empty[hidden]{display:none}

/* 遮罩 */
.rail__scrim{
  order:6;
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(14,14,14,.58);
  opacity:0;
  visibility:hidden;
  transition:opacity .35s var(--ease),visibility .35s var(--ease);
}
.site-rail[data-open] .rail__scrim{opacity:1;visibility:visible}
@media (min-width:1024px){ .rail__scrim{display:none} }

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--gold);
  background:transparent;
  color:var(--gold);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
  transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.btn:hover,.btn:focus-visible{background:var(--gold);color:var(--ink-deep)}
.btn--solid{background:var(--gold);border-color:var(--gold);color:var(--ink-deep)}
.btn--solid:hover,.btn--solid:focus-visible{background:var(--gold-soft);border-color:var(--gold-soft)}
.btn--ghost{border-color:rgba(240,235,224,.32);color:var(--sand)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--gold);border-color:var(--gold);color:var(--ink-deep)}

/* ---------- 8. 容器与网格 ---------- */
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media (min-width:768px){ .wrap{padding:0 32px} }
@media (min-width:1024px){ .wrap{padding:0 48px} }

.section{padding:var(--sp-1) 0}
@media (min-width:768px){ .section{padding:var(--sp-2) 0} }
@media (min-width:1024px){ .section{padding:var(--sp-3) 0} }

.stack{display:flex;flex-direction:column;gap:20px}
.cluster{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.asym{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){ .asym{grid-template-columns:minmax(0,1fr) minmax(0,3fr);gap:44px} }
.bento{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){ .bento{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (min-width:1024px){ .bento{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px} }

.card{
  position:relative;
  padding:22px;
  background:var(--paper);
  border:1px solid var(--hair-2);
}
.card--accent{border-top:2px solid var(--gold)}
.card__kicker{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--mid);
}

/* ---------- 9. 面包屑 ---------- */
.crumbs{padding:16px 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--mid);
}
.crumbs li::after{content:"/";margin-left:8px;color:rgba(92,88,82,.42)}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--mid);transition:color .3s var(--ease)}
.crumbs a:hover,.crumbs a:focus-visible{color:var(--gold)}
.crumbs [aria-current="page"]{color:var(--ink)}

/* ---------- 10. 图像容器 ---------- */
.fig{margin:0}
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--paper);
  border:1px solid var(--hair);
}
.frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.02) sepia(.04)}
.frame--wide{aspect-ratio:16/9}
.frame--square{aspect-ratio:1/1}
.frame--tall{aspect-ratio:3/4}
.frame--panel{aspect-ratio:4/3}
.frame__cap{
  display:block;
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mid);
}
.frame__ph{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:12px;
  text-align:center;
  background:
    repeating-linear-gradient(135deg,rgba(245,166,35,.07) 0 12px,transparent 12px 24px),
    var(--paper);
  color:var(--mid);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
}

/* ---------- 11. 页脚 ---------- */
.site-foot{
  position:relative;
  background:var(--ink-deep);
  color:var(--sand);
  border-top:1px solid var(--hair);
  padding:56px 20px 26px;
}
@media (min-width:768px){ .site-foot{padding:72px 32px 30px} }
@media (min-width:1024px){ .site-foot{padding:88px 48px 34px} }

.foot__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  max-width:1280px;
  margin:0 auto;
}
@media (min-width:768px){ .foot__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px 32px} }
@media (min-width:1024px){ .foot__grid{grid-template-columns:1.6fr repeat(4,minmax(0,1fr));gap:48px} }

.foot__brand{max-width:34ch}
.foot__mark{
  font-family:var(--font-display);
  font-size:30px;
  font-weight:800;
  letter-spacing:.18em;
  color:var(--sand);
  line-height:1.1;
}
.foot__line{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--gold);
}
.foot__note{
  margin-top:16px;
  font-size:13.5px;
  line-height:1.9;
  color:rgba(240,235,224,.6);
}
.foot__cta{margin-top:22px}

.foot__col{min-width:0}
.foot__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.26em;
  color:var(--gold);
}
.foot__links{display:flex;flex-direction:column;gap:9px}
.foot__link{
  position:relative;
  display:inline-block;
  padding-bottom:2px;
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:.04em;
  color:rgba(240,235,224,.78);
  transition:color .3s var(--ease);
}
.foot__link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:1px;
  background:var(--gold);
  transition:width .35s var(--ease);
}
.foot__link:hover,.foot__link:focus-visible{color:var(--gold)}
.foot__link:hover::after,.foot__link:focus-visible::after{width:100%}

.foot__contact{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
  max-width:1280px;
  margin:46px auto 0;
  padding-top:24px;
  border-top:1px solid var(--hair-3);
}
@media (min-width:768px){ .foot__contact{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 32px} }
.foot__contact-item{
  font-size:13px;
  line-height:1.8;
  color:rgba(240,235,224,.66);
}
.foot__contact-item .mono{color:var(--sand)}
.foot__contact-item--wide{grid-column:1/-1}

.foot__bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px 26px;
  max-width:1280px;
  margin:24px auto 0;
  padding-top:18px;
  border-top:1px solid rgba(240,235,224,.08);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:rgba(240,235,224,.45);
}

/* ---------- 12. 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;
    transition-delay:0ms !important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
}