@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

:root{
  --plum:#56228b;
  --clay:#8b4513;
  --ink:#1f1726;
  --stone:#e9e8ee;
  --stone-2:#dfdde6;
  --card:#f4f3f7;
  --card-warm:#f8f2ec;
  --muted:#5b5464;
  --line:rgba(86,34,139,.14);
  --soft:0 1px 2px rgba(31,23,38,.05), 0 16px 30px -22px rgba(31,23,38,.45);
  --r-a:24px 18px 26px 16px;
  --r-b:16px 26px 18px 24px;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  padding-bottom:120px;
  background-color:var(--stone);
  background-image:
    radial-gradient(circle at 10% 6%, rgba(86,34,139,.12), transparent 42%),
    radial-gradient(circle at 92% 2%, rgba(139,69,19,.12), transparent 40%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size:17px;
  line-height:1.72;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(31,23,38,.055) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.55;
}

main,
.foot,
.dock{position:relative;z-index:1}

.wrap{
  max-width:1120px;
  margin:0 auto;
  padding:0 18px;
}

/* 首屏 */
.hero{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  align-items:center;
  gap:26px;
  min-height:45vh;
  padding:26px 0 12px;
}

.hero-art{
  aspect-ratio:5/4;
  overflow:hidden;
  border-radius:48% 52% 40% 60% / 54% 44% 56% 46%;
  background-image:linear-gradient(155deg, rgba(86,34,139,.2), rgba(139,69,19,.22));
  box-shadow:var(--soft);
}

.hero-art img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.hero-copy{text-align:center}

h1{
  margin:0 0 10px;
  font-size:clamp(26px, 4.4vw, 41px);
  line-height:1.27;
  letter-spacing:-.015em;
  color:var(--ink);
}

.lead{
  margin:0 auto;
  max-width:38ch;
  font-size:16px;
  line-height:1.65;
  color:var(--muted);
}

/* 正文 + 侧栏 */
.stage{
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:26px;
  align-items:start;
  padding:16px 0 40px;
}

.prose > div{
  margin:0 0 22px;
  padding:26px 24px 28px;
  background:var(--card);
  border-radius:var(--r-a);
  box-shadow:var(--soft);
  scroll-margin-top:16px;
}

.prose > div:nth-of-type(even){
  background:var(--card-warm);
  border-radius:var(--r-b);
}

.prose > div:last-child{margin-bottom:0}

.prose h2{
  margin:0 0 12px;
  font-size:clamp(21px, 2.4vw, 27px);
  line-height:1.34;
  letter-spacing:-.012em;
  color:var(--ink);
}

.prose h2::after{
  content:"";
  display:block;
  width:44px;
  height:3px;
  margin-top:10px;
  border-radius:3px;
  background-image:linear-gradient(90deg, var(--plum), var(--clay));
}

.prose h3{
  margin:22px 0 6px;
  font-size:19px;
  line-height:1.4;
  color:var(--plum);
}

.prose p{margin:0 0 14px}
.prose p:last-child{margin-bottom:0}

.prose ul,
.prose ol{
  margin:0 0 14px;
  padding-left:1.15em;
}

.prose li{margin:5px 0}
.prose li::marker{color:var(--clay)}

.prose a{
  color:var(--plum);
  text-decoration:underline;
  text-decoration-color:rgba(86,34,139,.36);
  text-underline-offset:3px;
}

.prose a:hover{text-decoration-color:var(--plum)}

.prose strong,
.prose b{color:var(--clay)}

.prose blockquote{
  margin:16px 0;
  padding:12px 18px;
  border-radius:18px 22px 16px 20px;
  background:rgba(86,34,139,.07);
  color:var(--ink);
}

.prose blockquote p:last-child{margin-bottom:0}

.prose img{
  display:block;
  max-width:100%;
  height:auto;
  margin:16px 0;
  border-radius:18px;
}

.prose figure{margin:16px 0}

.prose time{
  font-size:16px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

.prose table{
  width:100%;
  border-collapse:collapse;
  font-size:16px;
}

.prose td,
.prose th{
  padding:8px 10px;
  text-align:left;
  border-bottom:1px solid var(--line);
}

/* 侧栏 */
.rail{
  position:sticky;
  top:20px;
  padding:20px 16px 18px;
  background:#f6f3fa;
  border-radius:26px 18px 24px 18px;
  box-shadow:var(--soft);
}

.rail-h{
  margin:0 0 4px;
  font-size:18px;
  line-height:1.4;
  color:var(--plum);
}

.subtitle{
  margin:0 0 14px;
  font-size:16px;
  line-height:1.5;
  color:var(--muted);
}

.rail-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}

.rail-list a{
  display:flex;
  align-items:center;
  gap:9px;
  min-height:40px;
  padding:8px 10px;
  border-radius:13px;
  color:var(--ink);
  font-size:16px;
  line-height:1.4;
  text-decoration:none;
}

.rail-list a::before{
  content:"";
  flex:0 0 auto;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--clay);
  opacity:.65;
}

.rail-list a:hover{
  background:rgba(86,34,139,.11);
  color:var(--plum);
}

/* 页脚 */
.foot{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px 20px;
  max-width:1120px;
  margin:0 auto;
  padding:20px 18px 6px;
}

.foot-brand{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:4px 0;
  font-weight:700;
  font-size:16px;
  color:var(--plum);
  text-decoration:none;
}

.foot-logo{
  height:26px;
  width:auto;
  display:block;
}

.foot-nav{
  flex:1 1 260px;
  min-width:0;
}

.foot-nav dl{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:0 14px;
  margin:0;
}

.foot-nav dt{
  margin:0;
  font-size:16px;
  color:var(--clay);
}

.foot-nav dd{margin:0}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:4px 0;
  font-size:16px;
  color:var(--ink);
  text-decoration:none;
}

.foot-nav a:hover{color:var(--plum)}

.foot-copy{
  font-size:16px;
  color:var(--muted);
}

/* 底部固定条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  gap:14px;
  padding:8px 14px calc(8px + env(safe-area-inset-bottom));
  background:rgba(238,236,242,.95);
  border-top:1px solid var(--line);
  border-radius:22px 22px 0 0;
  box-shadow:0 -12px 30px -18px rgba(31,23,38,.45);
  backdrop-filter:blur(10px);
}

.dock-nav{
  display:flex;
  flex:1;
  align-items:center;
  gap:2px;
  min-width:0;
}

.dock-l,
.dock-r{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}

.dock-l{margin-right:auto}
.dock-r{margin-left:auto}

.dock-nav a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  padding:8px 10px;
  border-radius:14px;
  font-size:16px;
  line-height:1.3;
  color:var(--ink);
  text-decoration:none;
  white-space:nowrap;
}

.dock-nav a:hover{
  background:rgba(86,34,139,.11);
  color:var(--plum);
}

.ico{
  flex:0 0 auto;
  width:13px;
  height:13px;
  fill:currentColor;
  opacity:.5;
}

.dock-brand{
  flex:0 0 auto;
  padding:8px 14px;
  border-radius:999px;
  background:rgba(86,34,139,.12);
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--plum);
  text-decoration:none;
  white-space:nowrap;
}

.dock-search{
  display:flex;
  align-items:center;
  gap:6px;
  padding:4px 6px 4px 14px;
  border-radius:999px;
  background:#fff;
  box-shadow:inset 0 0 0 1px var(--line);
}

.dock-search.miss{box-shadow:inset 0 0 0 2px var(--clay)}

.dock-search input{
  width:132px;
  min-height:40px;
  border:0;
  background:transparent;
  font:inherit;
  font-size:16px;
  color:var(--ink);
  outline:none;
}

.dock-search button{
  min-height:40px;
  padding:8px 15px;
  border:0;
  border-radius:999px;
  background:var(--plum);
  color:#fff;
  font:inherit;
  font-size:16px;
  cursor:pointer;
}

.dock-search button:hover{background:#47186f}

/* 动效 */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s ease, transform .65s cubic-bezier(.22,.7,.3,1);
}

.reveal.in{
  opacity:1;
  transform:none;
}

.rail.reveal li{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .4s ease, transform .45s ease;
}

.rail.in li{
  opacity:1;
  transform:none;
}

.rail.in li:nth-child(1){transition-delay:.02s}
.rail.in li:nth-child(2){transition-delay:.06s}
.rail.in li:nth-child(3){transition-delay:.1s}
.rail.in li:nth-child(4){transition-delay:.14s}
.rail.in li:nth-child(5){transition-delay:.18s}
.rail.in li:nth-child(6){transition-delay:.22s}
.rail.in li:nth-child(7){transition-delay:.26s}

@media (max-width:900px){
  .stage{grid-template-columns:1fr;gap:18px}
  .rail{position:static}
}

@media (max-width:820px){
  body{padding-bottom:238px}

  .hero{
    grid-template-columns:1fr;
    min-height:0;
    gap:16px;
    padding:18px 0 6px;
  }

  .hero-art{
    aspect-ratio:16/10;
    border-radius:42% 58% 44% 56% / 58% 44% 56% 42%;
  }

  .prose > div{padding:22px 18px 24px}

  .dock{
    flex-wrap:wrap;
    justify-content:center;
    gap:6px;
    padding:8px 10px calc(8px + env(safe-area-inset-bottom));
  }

  .dock-nav{
    flex:1 0 100%;
    flex-wrap:wrap;
    justify-content:center;
    row-gap:2px;
  }

  .dock-l,
  .dock-r{
    margin:0;
    flex-wrap:wrap;
    justify-content:center;
  }

  .dock-nav a{min-height:42px;padding:7px 8px}

  .dock-search{
    flex:1 0 100%;
  }

  .dock-search input{width:100%}

  .foot{
    flex-direction:column;
    align-items:flex-start;
    gap:2px;
    padding-bottom:10px;
  }

  .foot-nav{width:100%;flex:0 0 auto}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}

  .reveal,
  .rail.reveal li{
    opacity:1;
    transform:none;
    transition:none;
  }
}

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