@import url('https://fonts.googleapis.com/css2?family=Cormorant Garamond:wght@400;500;600;700&family=Libre Baskerville:wght@400;700&display=swap');

:root{
  --paper:#ffffff;
  --stone:#f5f5f5;
  --ink:#1f1f1f;
  --dim:#6d6d6d;
  --line:#e3e3e3;
  --serif:"Cormorant Garamond","Libre Baskerville","Songti SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --e1:0 1px 3px rgba(31,31,31,.07);
  --e2:0 8px 20px rgba(31,31,31,.08);
  --e3:0 18px 42px rgba(31,31,31,.12);
  --e4:0 34px 74px rgba(31,31,31,.15);
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  overflow-x:hidden;
  background:var(--stone);
  color:var(--ink);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;height:auto}

a{color:inherit}

h1,h2,h3{font-weight:600;line-height:1.25;letter-spacing:.005em}

/* 角落印记 */
.sigil{
  position:fixed;
  left:18px;
  top:18px;
  z-index:70;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  background:var(--ink);
  color:#fff;
  text-decoration:none;
  font-size:22px;
  line-height:1;
  box-shadow:var(--e3);
}
.sigil img{display:block;width:30px;height:30px;object-fit:contain;filter:invert(1)}

/* Hero */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  align-items:center;
  gap:clamp(22px,4vw,56px);
  min-height:100svh;
  max-width:1180px;
  margin:0 auto;
  padding:118px 32px 72px;
}
.hero-copy{position:relative;z-index:3;min-width:0}
.hero-kicker{
  margin:0 0 12px;
  font-size:16px;
  letter-spacing:.3em;
  color:var(--dim);
}
.hero h1{
  margin:0 0 22px;
  font-size:clamp(34px,5.2vw,62px);
  line-height:1.14;
  text-wrap:balance;
}
.hero-lead{
  margin:0 0 30px;
  max-width:30em;
  font-size:18px;
  color:#3d3d3d;
}
.hero-cue-wrap{margin:0}
.hero-cue{
  display:inline-flex;
  align-items:center;
  min-height:50px;
  padding:0 30px;
  border:1.5px solid var(--ink);
  text-decoration:none;
  font-size:16px;
  letter-spacing:.16em;
  background:var(--paper);
  box-shadow:var(--e2);
  transition:background .25s ease,color .25s ease,box-shadow .25s ease;
}
.hero-cue:hover{background:var(--ink);color:#fff;box-shadow:var(--e3)}

.hero-art{
  position:relative;
  z-index:2;
  min-width:0;
  min-height:clamp(250px,42vh,460px);
  background:linear-gradient(140deg,#ebebeb 0%,#fafafa 52%,#dedede 100%);
  box-shadow:var(--e4);
  overflow:hidden;
  will-change:transform;
}
.hero-art img{
  display:block;
  width:100%;
  height:100%;
  min-height:inherit;
  object-fit:cover;
}

/* 主体：左栏 + 正文 */
.shell{
  max-width:1180px;
  margin:0 auto;
  padding:10px 32px 0;
  display:grid;
  grid-template-columns:218px minmax(0,1fr);
  gap:0 44px;
  align-items:start;
}

.rail{
  position:sticky;
  top:30px;
  z-index:4;
  min-width:0;
  padding-top:6px;
}
.rail-title{
  margin:0 0 2px;
  font-size:19px;
  letter-spacing:.06em;
}
.rail .subtitle{
  margin:0 0 16px;
  font-size:13px;
  letter-spacing:.16em;
  color:var(--dim);
}
.rail-list{
  list-style:none;
  margin:0;
  padding:0;
  min-width:0;
  counter-reset:rail;
}
.rail-list li{counter-increment:rail}
.rail-list a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  text-decoration:none;
  color:#3b3b3b;
  font-size:16px;
  border-bottom:1px solid var(--line);
  transition:color .2s ease,transform .2s ease;
}
.rail-list a:hover{color:var(--ink);transform:translateX(4px)}
.rail-no{
  font-size:12px;
  letter-spacing:.1em;
  color:#a0a0a0;
}

/* 正文卡片：层叠 */
.read{
  min-width:0;
  position:relative;
  padding-top:6px;
  overflow-wrap:break-word;
}
.read > article{
  position:relative;
  background:var(--paper);
  padding:30px 34px 34px;
  box-shadow:var(--e2);
  border-bottom:4px solid var(--ink);
  scroll-margin-top:26px;
  transition:transform .3s ease,box-shadow .3s ease;
}
.read > article + article{margin-top:-12px}
.read > article:nth-of-type(2n){z-index:2}
.read > article:nth-of-type(3n){z-index:3}
.read > article:hover{transform:translateY(-4px);box-shadow:var(--e3);z-index:6}

.read h2{
  font-size:clamp(22px,2.8vw,30px);
  margin:.2em 0 .55em;
}
.read h3{font-size:20px;margin:1.4em 0 .5em}
.read p{margin:0 0 1.1em}
.read a{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.read ul,.read ol{padding-left:1.25em}
.read li{margin:.3em 0}
.read img{display:block;margin:1.2em 0;box-shadow:var(--e2)}
.read blockquote{
  margin:1.4em 0;
  padding:12px 22px;
  background:var(--stone);
  border-left:4px solid var(--ink);
}
.read blockquote p:last-child{margin-bottom:0}
.read pre{max-width:100%;overflow-x:auto;background:#f0f0f0;padding:14px 16px}
.read table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;box-shadow:var(--e1)}
.read th,.read td{border:1px solid var(--line);padding:8px 10px;text-align:left}

/* 页脚 */
.site-foot{
  position:relative;
  z-index:10;
  margin-top:80px;
  background:var(--paper);
  border-top:4px solid var(--ink);
  padding:46px 0 132px;
  box-shadow:0 -20px 46px rgba(31,31,31,.06);
}
.foot-grid{
  max-width:1180px;
  margin:0 auto;
  padding:0 32px;
  display:grid;
  grid-template-columns:1.15fr .95fr .95fr;
  gap:34px;
  align-items:start;
}
.foot-col{min-width:0}
.foot-mark{
  display:inline-grid;
  place-items:center;
  width:50px;
  height:50px;
  background:var(--ink);
  color:#fff;
  text-decoration:none;
  font-size:23px;
  line-height:1;
  box-shadow:var(--e2);
}
.foot-mark img{display:block;width:32px;height:32px;object-fit:contain;filter:invert(1)}
address{
  font-style:normal;
  margin-top:16px;
  font-size:16px;
  color:var(--dim);
  word-break:break-all;
}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col a{
  display:flex;
  align-items:center;
  min-height:42px;
  font-size:16px;
  text-decoration:none;
  border-bottom:1px solid var(--line);
  transition:padding-left .2s ease;
}
.foot-col a:hover{padding-left:5px}
.foot-base{
  max-width:1180px;
  margin:38px auto 0;
  padding:18px 32px 0;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:16px;
  color:var(--dim);
}

/* 底部固定条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 28px rgba(31,31,31,.11);
}
.dock nav{max-width:1180px;margin:0 auto;padding:4px 10px 6px}
.dock dl{
  display:grid;
  grid-auto-flow:column;
  grid-template-rows:auto auto;
  grid-auto-columns:minmax(92px,1fr);
  margin:0;
  min-width:0;
  overflow-x:auto;
  overscroll-behavior-x:contain;
  scrollbar-width:none;
}
.dock dl::-webkit-scrollbar{display:none}
.dock dt,.dock dd{margin:0;min-width:0}
.dock dt a,.dock dd a{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  text-decoration:none;
  white-space:nowrap;
  font-size:16px;
}
.dock dt a{color:#9a9a9a;font-size:16px;letter-spacing:.12em}
.dock dd a{color:var(--ink)}
.dock a:hover{text-decoration:underline;text-underline-offset:4px}

/* 动效 */
html.js .reveal{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.22,.61,.36,1);
}
html.js .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .read > article{transition:none}
}

/* 窄屏 */
@media (max-width:900px){
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:auto;
    padding:96px 20px 44px;
    gap:26px;
  }
  .hero h1{font-size:clamp(30px,8vw,44px)}
  .hero-lead{font-size:17px;margin-bottom:24px}
  .hero-art{min-height:208px}
  .sigil{width:42px;height:42px;font-size:20px;left:14px;top:14px}

  .shell{
    grid-template-columns:minmax(0,1fr);
    padding:0 16px;
    gap:18px;
  }
  .rail{position:static;padding-top:0;min-width:0;max-width:100%}
  .rail .subtitle{margin-bottom:10px}
  .rail-list{
    display:flex;
    gap:8px;
    max-width:100%;
    min-width:0;
    overflow-x:auto;
    overscroll-behavior-x:contain;
    padding-bottom:4px;
    scrollbar-width:none;
  }
  .rail-list::-webkit-scrollbar{display:none}
  .rail-list li{flex:0 0 auto}
  .rail-list a{
    min-height:42px;
    padding:0 14px;
    background:var(--paper);
    border:1px solid var(--line);
    border-bottom:3px solid var(--ink);
    white-space:nowrap;
  }
  .rail-no{display:none}

  .read > article{padding:22px 18px 26px}
  .read > article + article{margin-top:-8px}

  .site-foot{margin-top:52px;padding:34px 0 124px}
  .foot-grid{grid-template-columns:minmax(0,1fr);padding:0 18px;gap:18px}
  .foot-base{margin-top:24px;padding:16px 18px 0}
  .foot-col a{min-height:44px}
}

@media (max-width:420px){
  .hero{padding-top:88px}
  .dock dt a,.dock dd a{font-size:16px}
  .read > article{padding:20px 16px 24px}
}

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