:root{
  --ink:#0E1116;
  --ink-2:#12161D;
  --brass:#C8A96A;
  --bone:#F2EDE4;
  --muted:rgba(242,237,228,.70);
  --hair:rgba(200,169,106,.24);
  --hair-soft:rgba(200,169,106,.13);
  --display:'Cinzel','Songti SC','Noto Serif SC',Georgia,serif;
  --dock-h:70px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--ink);
  color:var(--bone);
  font-family:'Josefin Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.78;
  letter-spacing:.01em;
  padding-bottom:calc(var(--dock-h) + 44px);
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block}
p{margin:0 0 1.05em}
a{color:var(--brass)}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:4px}

[id]{scroll-margin-top:20px;scroll-margin-bottom:calc(var(--dock-h) + 32px)}

/* ---------- 底部固定导航条 ---------- */
.dock{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
  padding:8px 20px;
  background:rgba(14,17,22,.93);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-top:1px solid var(--hair);
  box-shadow:0 -18px 40px rgba(0,0,0,.45);
}

.dock-nav{min-width:0}
.dock-nav p{
  margin:0;
  display:flex;
  align-items:center;
  gap:2px;
}
.dock-nav-start p{justify-content:flex-end}
.dock-nav-end{display:flex;align-items:center;justify-content:flex-start}

.dock-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:11px 11px;
  font-size:16px;
  line-height:1.2;
  color:var(--muted);
  text-decoration:none;
  letter-spacing:.08em;
  border-radius:9px;
  white-space:nowrap;
  transition:color .28s ease,background-color .28s ease;
}
.dock-nav a:hover,
.dock-nav a:focus-visible{color:var(--ink);background:var(--brass)}

.dock-brand{
  font-family:var(--display);
  font-size:20px;
  letter-spacing:.26em;
  text-indent:.26em;
  color:var(--bone);
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:8px 18px;
  border-left:1px solid var(--hair-soft);
  border-right:1px solid var(--hair-soft);
  transition:color .28s ease;
}
.dock-brand:hover{color:var(--brass)}

.dock-cta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:10px 20px;
  font-size:16px;
  letter-spacing:.12em;
  color:var(--brass);
  text-decoration:none;
  border:1px solid var(--brass);
  border-radius:999px;
  white-space:nowrap;
  transition:background-color .28s ease,color .28s ease;
}
.dock-cta:hover{background:var(--brass);color:var(--ink)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  isolation:isolate;
  display:flex;
  align-items:flex-end;
  min-height:100vh;
  min-height:100svh;
  padding:90px 0 150px;
  overflow:hidden;
  background:var(--ink);
}

.hero-plate{
  position:absolute;
  inset:-6% 0 0 0;
  margin:0;
  z-index:-3;
  will-change:transform;
}
.hero-plate .hero-img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:grayscale(.42) brightness(.6) contrast(1.06);
}
.hero-veil{
  position:absolute;
  inset:0;
  background:
    radial-gradient(120% 80% at 18% 82%, rgba(14,17,22,.18), rgba(14,17,22,.96) 72%),
    linear-gradient(to top,var(--ink) 2%,rgba(14,17,22,.28) 42%,rgba(14,17,22,.82) 100%);
}

.hero-word{
  position:absolute;
  left:-3%;right:-3%;
  top:12%;
  z-index:-2;
  display:flex;
  justify-content:center;
  pointer-events:none;
  will-change:transform;
}
.hero-word span{
  font-family:var(--display);
  font-size:clamp(84px,25vw,300px);
  line-height:.92;
  letter-spacing:.08em;
  white-space:nowrap;
  color:transparent;
  -webkit-text-stroke:1px rgba(200,169,106,.34);
  opacity:.9;
}

.hero-copy{
  position:relative;
  z-index:2;
  width:100%;
  max-width:1120px;
  margin:0 auto;
  padding:0 24px;
  will-change:opacity;
}

.hero-title{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(32px,6.2vw,68px);
  line-height:1.14;
  letter-spacing:.05em;
  margin:0;
  max-width:16em;
  text-align:left;
  text-shadow:0 18px 46px rgba(0,0,0,.6);
}
.hero-title::before{
  content:"";
  display:block;
  width:74px;
  height:1px;
  margin-bottom:28px;
  background:linear-gradient(to right,var(--brass),rgba(200,169,106,0));
}

/* ---------- 章节区 ---------- */
.chapters{
  position:relative;
  max-width:1120px;
  margin:0 auto;
  padding:76px 24px 20px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 292px;
  gap:60px;
  align-items:start;
}

.chapter-flow{min-width:0}

.chapter-flow > div{
  position:relative;
  padding:8px 0 46px;
  border-bottom:1px solid var(--hair-soft);
}
.chapter-flow > div + div{padding-top:46px}
.chapter-flow > div:last-child{border-bottom:0}

.chapter-flow small,
.chapter-aside small{
  display:block;
  font-size:16px;
  line-height:1.4;
  letter-spacing:.34em;
  text-indent:.34em;
  color:var(--brass);
  margin-bottom:10px;
}

.chapter-flow h2{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(24px,3.1vw,34px);
  line-height:1.3;
  letter-spacing:.04em;
  margin:0 0 .62em;
  color:var(--bone);
}
.chapter-flow h3{
  font-family:var(--display);
  font-weight:500;
  font-size:21px;
  line-height:1.4;
  letter-spacing:.03em;
  margin:1.5em 0 .5em;
  color:var(--brass);
}
.chapter-flow p{color:var(--muted)}
.chapter-flow strong{color:var(--bone);font-weight:600}
.chapter-flow a{color:var(--brass);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.chapter-flow a:hover{color:var(--bone)}

.chapter-flow ul,
.chapter-flow ol{
  margin:0 0 1.2em;
  padding-left:1.35em;
  color:var(--muted);
}
.chapter-flow li{margin-bottom:.5em}
.chapter-flow li::marker{color:var(--brass)}

.chapter-flow blockquote{
  margin:1.6em 0;
  padding:2px 0 2px 22px;
  border-left:1px solid var(--brass);
  color:var(--bone);
  font-size:18px;
}

.chapter-flow figure{margin:1.8em 0}
.chapter-flow figure img{border-radius:18px;border:1px solid var(--hair)}

/* ---------- 右侧栏 ---------- */
.chapter-aside{
  position:sticky;
  top:26px;
  padding:24px 20px 18px;
  border:1px solid var(--hair);
  border-radius:18px;
  background:linear-gradient(180deg,rgba(200,169,106,.085),rgba(200,169,106,0) 78%);
}

.aside-title{
  font-family:var(--display);
  font-weight:500;
  font-size:20px;
  letter-spacing:.16em;
  margin:0 0 14px;
  color:var(--bone);
}

.aside-list{
  list-style:none;
  counter-reset:s;
  margin:0;
  padding:0;
}
.aside-list li a{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  padding:10px 2px;
  font-size:16px;
  line-height:1.35;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px dashed var(--hair-soft);
  transition:color .25s ease,padding-left .25s ease;
}
.aside-list li:last-child a{border-bottom:0}
.aside-list li a::before{
  counter-increment:s;
  content:counter(s,decimal-leading-zero);
  font-size:15px;
  letter-spacing:.06em;
  color:var(--brass);
  opacity:.75;
}
.aside-list li a:hover,
.aside-list li a:focus-visible{color:var(--bone);padding-left:7px}

/* ---------- 页脚 ---------- */
.foot{
  margin-top:56px;
  padding:60px 24px 28px;
  border-top:1px solid var(--hair);
  background:linear-gradient(180deg,rgba(200,169,106,.07),rgba(200,169,106,0) 60%);
}
.foot-inner{max-width:1120px;margin:0 auto}

.foot-brand{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(52px,15vw,148px);
  line-height:.88;
  letter-spacing:.06em;
  margin:0 0 40px;
  color:rgba(242,237,228,.10);
  -webkit-text-stroke:1px rgba(200,169,106,.55);
}

.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
  padding-top:28px;
  border-top:1px solid var(--hair-soft);
}
.foot-cols dl{margin:0}
.foot-cols dt{
  font-size:16px;
  letter-spacing:.26em;
  text-indent:.26em;
  color:var(--brass);
  margin-bottom:12px;
}
.foot-cols dd{
  margin:0;
  color:var(--muted);
  font-size:16px;
}
.foot-links{display:flex;flex-direction:column}
.foot-links a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:7px 0;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid rgba(200,169,106,.08);
  transition:color .25s ease,padding-left .25s ease;
}
.foot-links a:hover{color:var(--brass);padding-left:6px}
.foot-top{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 16px;
  color:var(--brass);
  text-decoration:none;
  border:1px solid var(--hair);
  border-radius:999px;
  transition:background-color .25s ease,color .25s ease;
}
.foot-top:hover{background:var(--brass);color:var(--ink)}

.foot-base{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:34px;
  padding-top:18px;
  border-top:1px solid var(--hair-soft);
  color:var(--muted);
  font-size:16px;
}
.foot-base a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 16px;
  color:var(--brass);
  text-decoration:none;
  border:1px solid var(--hair);
  border-radius:999px;
  transition:background-color .25s ease,color .25s ease;
}
.foot-base a:hover{background:var(--brass);color:var(--ink)}

/* ---------- 滚动叙事动效 ---------- */
html.js .reveal{
  opacity:0;
  transform:translate3d(0,28px,0);
  transition:opacity .82s cubic-bezier(.2,.72,.28,1),transform .82s cubic-bezier(.2,.72,.28,1);
  will-change:opacity,transform;
}
html.js .reveal.is-in{
  opacity:1;
  transform:none;
}

/* ---------- 移动端 ---------- */
@media (max-width:820px){
  :root{--dock-h:104px}

  body{padding-bottom:calc(var(--dock-h) + 28px);font-size:17px}

  .dock{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:2px;
    padding:6px 10px calc(8px + env(safe-area-inset-bottom));
  }
  .dock-brand{
    order:-1;
    flex:1 1 100%;
    justify-content:center;
    min-height:44px;
    padding:6px;
    font-size:18px;
    border-left:0;
    border-right:0;
    border-bottom:1px solid var(--hair-soft);
  }
  .dock-nav{flex:1 1 0;min-width:0}
  .dock-nav-start p{justify-content:flex-start}
  .dock-nav p{overflow-x:auto;scrollbar-width:none}
  .dock-nav p::-webkit-scrollbar{display:none}
  .dock-nav a{padding:11px 9px;font-size:16px}
  .dock-cta{display:none}

  .hero{padding:80px 0 140px}
  .hero-word{top:16%}
  .hero-title::before{width:56px;margin-bottom:20px}

  .chapters{
    grid-template-columns:minmax(0,1fr);
    gap:36px;
    padding:56px 18px 10px;
  }
  .chapter-aside{position:static}

  .foot{padding:48px 18px 24px}
  .foot-brand{margin-bottom:28px}
  .foot-cols{grid-template-columns:minmax(0,1fr);gap:22px}
}

@media (max-width:400px){
  .hero-title{font-size:clamp(28px,8vw,38px)}
  .chapter-flow h2{font-size:24px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .reveal{opacity:1;transform:none;transition:none}
  .hero-plate,
  .hero-word{transform:none !important}
  .hero-copy{opacity:1 !important}
}

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