:root{
  --ink:#000000;
  --paper:#ffffff;
  --fog:#f2f2f2;
  --line:#e4e4e4;
  --mute:#5c5c5c;
  --dock:15rem;
  --rail:11rem;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans Hebrew",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.72;
  letter-spacing:.004em;
}
h1,h2,h3{font-weight:700;line-height:1.22;letter-spacing:-.015em}
p{margin:0 0 1rem}
img{max-width:100%}
a{color:inherit}
ul,ol{padding-left:1.25rem}

.skip{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:60;
  padding:.8rem 1.3rem;
  background:var(--ink);
  color:var(--paper);
  border-radius:0 0 18px 0;
  text-decoration:none;
  font-size:.92rem;
}
.skip:focus{left:0}

.frame{padding-left:var(--dock)}

/* 侧置固定导航 */
.dock{
  position:fixed;
  top:0;
  bottom:0;
  left:0;
  width:var(--dock);
  display:flex;
  flex-direction:column;
  gap:2.2rem;
  padding:2rem 1.4rem;
  background:var(--paper);
  border-right:1px solid var(--line);
  overflow-y:auto;
  z-index:40;
}
.brand{
  display:block;
  font-size:1.12rem;
  font-weight:700;
  line-height:1.35;
  letter-spacing:-.02em;
  text-decoration:none;
}
.brand::before{
  content:"";
  display:block;
  width:34px;
  height:8px;
  margin-bottom:.75rem;
  background:var(--ink);
}
.pills{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:.4rem;
}
.pills li{animation:rise .45s var(--ease) both}
.pills li:nth-child(2){animation-delay:.04s}
.pills li:nth-child(3){animation-delay:.08s}
.pills li:nth-child(4){animation-delay:.12s}
.pills li:nth-child(5){animation-delay:.16s}
.pills li:nth-child(6){animation-delay:.2s}
.pills li:nth-child(7){animation-delay:.24s}
.pill{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:.5rem 1.15rem;
  border-radius:999px;
  background:var(--fog);
  color:var(--ink);
  font-size:.94rem;
  text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.pill:hover,.pill:focus-visible{background:var(--ink);color:var(--paper);transform:translateX(4px)}
.pill.is-current{background:var(--ink);color:var(--paper)}

/* 首屏 */
.hero{
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  gap:1.5rem;
  min-height:70vh;
  max-width:1200px;
  margin:0 auto;
  padding:5rem 3rem 3.2rem;
  text-align:right;
}
.hero-lead{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:1.6rem;
  flex-wrap:wrap;
}
.hero-lead h1{
  flex:1 1 12ch;
  min-width:0;
  margin:0;
  font-size:clamp(2rem,5.1vw,3.4rem);
  line-height:1.14;
  letter-spacing:-.03em;
}
.hero-mark{
  flex:0 0 auto;
  width:5.5rem;
  height:5.5rem;
  border-radius:18px;
  background:var(--ink);
  overflow:hidden;
}
.hero-pic{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.hero-note{
  max-width:44ch;
  margin:0 0 0 auto;
  color:var(--mute);
  font-size:1rem;
  line-height:1.7;
}
.band{
  height:2.4rem;
  background:var(--ink);
  clip-path:polygon(0 36%,100% 0,100% 100%,0 100%);
}

/* 双栏网格：目录 + 正文 */
.stage{
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  gap:3rem;
  max-width:1200px;
  margin:0 auto;
  padding:3rem 3rem 4rem;
  align-items:start;
}
.toc{
  position:sticky;
  top:2rem;
  padding:1.2rem 1.1rem 1.3rem;
  border-radius:18px;
  background:var(--fog);
}
.toc h2{
  margin:0;
  font-size:.88rem;
  font-weight:500;
  letter-spacing:.16em;
}
.toc .subtitle{
  margin:.15rem 0 .85rem;
  color:var(--mute);
  font-size:.76rem;
  letter-spacing:.12em;
}
.toc ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:.3rem;
}
.toc a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.3rem .6rem;
  border-radius:10px;
  font-size:.9rem;
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.toc a:hover,.toc a:focus-visible,.toc a.is-current{background:var(--ink);color:var(--paper)}

main{min-width:0}
.body{
  max-width:68ch;
  min-width:0;
}
.body > section{scroll-margin-top:2rem}
.body > section + section{
  margin-top:2.8rem;
  padding-top:2.8rem;
  border-top:1px solid var(--line);
}
.body h2{
  margin:0 0 .7rem;
  font-size:clamp(1.35rem,2.8vw,1.85rem);
}
.body h2 + p{color:var(--mute)}
.body h3{
  margin:1.8rem 0 .5rem;
  font-size:1.1rem;
}
.body p{max-width:66ch}
.body ul,.body ol{margin:0 0 1.15rem}
.body li{margin:.35rem 0}
.body a{
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.body a:hover{background:var(--ink);color:var(--paper);text-decoration:none}
.body blockquote{
  margin:1.4rem 0;
  padding:.2rem 0 .2rem 1.1rem;
  border-left:4px solid var(--ink);
  color:var(--mute);
}
.body table{
  width:100%;
  margin:0 0 1.4rem;
  border-collapse:collapse;
  font-size:.95rem;
}
.body th,.body td{
  padding:.65rem .55rem;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.body th{font-weight:500;letter-spacing:.03em}
.body img{border-radius:18px}
.body time{
  display:inline-block;
  margin:0 0 .8rem;
  padding:.15rem .7rem;
  border-radius:999px;
  background:var(--fog);
  font-size:.82rem;
  letter-spacing:.04em;
}

/* 页脚 */
.site-foot{
  max-width:1200px;
  margin:2.5rem auto 0;
  padding:3.2rem 3rem 2rem;
  border-top:1px solid var(--line);
}
.foot-cta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
  margin-bottom:3rem;
  padding:2.8rem 2rem;
  border-radius:18px;
  background:var(--ink);
  color:var(--paper);
}
.cta-brand{
  margin:0;
  font-size:clamp(1.4rem,3.6vw,2.3rem);
  font-weight:700;
  letter-spacing:-.025em;
  line-height:1.2;
}
.cta-top{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.55rem 1.4rem;
  border-radius:999px;
  background:var(--paper);
  color:var(--ink);
  font-size:.92rem;
  text-decoration:none;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.cta-top:hover{transform:translateY(-2px)}
.foot-grid{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:2.5rem;
}
.foot-name{
  display:block;
  margin-bottom:1rem;
  font-size:1.5rem;
  font-style:normal;
  font-weight:700;
  letter-spacing:-.025em;
}
.foot-quick{
  list-style:none;
  margin:0;
  padding:0;
}
.foot-quick a,.foot-nav dd a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:.25rem 0;
  font-size:.95rem;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease);
}
.foot-quick a:hover,.foot-nav dd a:hover{border-bottom-color:var(--ink)}
.foot-nav dl{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 1.5rem;
  margin:0;
}
.foot-nav dt{
  grid-column:1 / -1;
  margin-bottom:.5rem;
  color:var(--mute);
  font-size:.76rem;
  letter-spacing:.16em;
}
.foot-nav dd{margin:0}
.copy{
  margin:2.6rem 0 0;
  color:var(--mute);
  font-size:.84rem;
  letter-spacing:.05em;
}

@keyframes rise{
  from{opacity:0;transform:translateY(9px)}
  to{opacity:1;transform:none}
}

@media (max-width:1000px){
  .stage{grid-template-columns:minmax(0,1fr);gap:2rem;padding:2.2rem 1.3rem 3rem}
  .toc{position:static;padding:1rem 1rem 1.1rem}
  .toc ul{
    grid-auto-flow:column;
    grid-auto-columns:max-content;
    overflow-x:auto;
    padding-bottom:.35rem;
    gap:.35rem;
  }
  .toc a{white-space:nowrap;padding:.3rem .85rem}
  .body{max-width:none}
  .body > section{scroll-margin-top:7rem}
}

@media (max-width:780px){
  .frame{padding-left:0}
  .dock{
    position:sticky;
    top:0;
    bottom:auto;
    left:auto;
    width:auto;
    flex-direction:row;
    align-items:center;
    gap:.9rem;
    padding:.7rem 1rem;
    border-right:0;
    border-bottom:1px solid var(--line);
    overflow-x:auto;
  }
  .brand{flex:0 0 auto;font-size:1rem}
  .brand::before{display:inline-block;width:18px;height:6px;margin:0 .45rem 2px 0;vertical-align:middle}
  .dock-nav{flex:1 1 auto;min-width:0}
  .pills{
    display:flex;
    gap:.4rem;
    padding-bottom:.15rem;
  }
  .pills li{flex:0 0 auto}
  .pill{white-space:nowrap;min-height:40px;padding:.4rem .95rem;font-size:.9rem}
  .pill:hover,.pill:focus-visible{transform:none}
  .hero{
    min-height:0;
    padding:2rem 1.2rem 2rem;
    gap:1.2rem;
  }
  .hero-lead{gap:1rem}
  .hero-mark{width:4rem;height:4rem;border-radius:14px}
  .hero-note{max-width:none}
  .band{height:1.3rem}
  .site-foot{padding:2.2rem 1.2rem 1.6rem}
  .foot-cta{padding:2rem 1.4rem;margin-bottom:2rem}
  .foot-grid{grid-template-columns:minmax(0,1fr);gap:1.8rem}
  .foot-nav dl{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-delay:0ms !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
}

button[aria-expanded]{min-width:44px;min-height:44px}