:root{
  --ink:#1f1726;
  --plum:#56228b;
  --clay:#8b4513;
  --moss:#5d7a4f;
  --paper:#f5efe4;
  --paper-2:#ece2d2;
  --line:rgba(31,23,38,.14);
  --glass:rgba(255,255,255,.6);
  --radius:22px;
  --radius-s:10px;
  --shadow:0 16px 32px -22px rgba(31,23,38,.62);
  --wrap:1080px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{
  margin:0;
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  overflow-x:clip;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(680px 420px at 88% -8%, rgba(139,69,19,.18), transparent 66%),
    radial-gradient(560px 400px at -12% 24%, rgba(86,34,139,.16), transparent 64%),
    radial-gradient(420px 320px at 60% 96%, rgba(93,122,79,.14), transparent 68%),
    repeating-linear-gradient(118deg, rgba(31,23,38,.026) 0 2px, transparent 2px 9px),
    var(--paper);
  background-attachment:fixed,fixed,scroll,fixed,scroll;
}
h1,h2,h3,.eyebrow,.btn,.nav a,.rail-title,.foot-title,.brand,.foot dt{
  font-family:"Space Grotesk","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:700;
  line-height:1.24;
  letter-spacing:-.012em;
}
a{color:var(--plum)}
img{max-width:100%;height:auto;display:block}
ul,ol{padding-left:1.2em}

/* 页头 */
.top{
  position:sticky;top:0;z-index:50;
  background:rgba(245,239,228,.84);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--line);
}
.top-inner{max-width:var(--wrap);margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.brand{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;text-decoration:none;
  border-radius:16px 20px 14px 22px;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.brand .mark,.brand img{width:26px;height:26px}
.nav{flex:1 1 auto;min-width:0}
.nav-row{margin:0;display:flex;align-items:center;gap:2px;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}
.nav-row::-webkit-scrollbar{display:none}
.nav-row a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 11px;
  border-radius:12px;text-decoration:none;color:var(--ink);
  font-size:.95rem;white-space:nowrap;
}
.nav-row a:hover,.nav-row a:focus-visible{background:rgba(86,34,139,.11);color:var(--plum)}
.more{position:relative;flex:0 0 auto}
.more summary{
  list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:0 12px;border-radius:12px;color:var(--clay);font-size:.9rem;
}
.more summary::-webkit-details-marker{display:none}
.more summary::after{content:"＋";font-size:.85rem}
.more[open] summary::after{content:"－"}
.more summary:hover{background:rgba(139,69,19,.12)}
.more-list{
  position:absolute;right:0;top:calc(100% + 10px);margin:0;min-width:180px;max-width:min(240px,72vw);
  padding:8px;display:grid;gap:2px;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
}
.more-list a{
  display:flex;align-items:center;min-height:42px;padding:0 12px;
  border-radius:11px;text-decoration:none;color:var(--ink);font-size:.92rem;
}
.more-list a:hover{background:rgba(139,69,19,.13);color:var(--clay)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 20px;border-radius:999px;
  text-decoration:none;font-size:.95rem;border:1px solid transparent;
  transition:transform .18s ease,background .18s ease,color .18s ease;
}
.btn-solid{background:linear-gradient(135deg,var(--plum),#3b1663);color:#f8f2ff;box-shadow:0 14px 24px -16px rgba(86,34,139,.95)}
.btn-solid:hover{transform:translateY(-2px)}
.btn-ghost{border-color:rgba(139,69,19,.45);background:rgba(255,255,255,.55);color:var(--clay)}
.btn-ghost:hover{background:rgba(139,69,19,.13)}
.top-cta{flex:0 0 auto}

/* 主体 */
.main{max-width:var(--wrap);margin:0 auto;padding:22px 18px 0}

.hero{
  position:relative;
  display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:center;
  min-height:45vh;padding:14px 0 40px;
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:18px;
  background:linear-gradient(90deg,var(--plum),var(--clay) 58%,var(--moss));
  transform:skewY(-1.6deg);border-radius:0 0 22px 22px;opacity:.82;
}
.eyebrow{
  display:inline-flex;align-items:center;margin:0;padding:6px 15px;
  border-radius:999px;font-size:.82rem;color:#3f5738;
  background:rgba(93,122,79,.17);border:1px solid rgba(93,122,79,.34);
}
h1{font-size:clamp(1.85rem,4.6vw,2.95rem);margin:.42em 0 .34em;color:var(--ink);overflow-wrap:break-word}
.lede{margin:0 0 18px;max-width:34em;font-size:1.03rem;color:#3b3045}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}
.hero-art{margin:0;min-width:0}
.hero-art svg{width:100%;max-width:min(300px,72vw);margin:0 auto;display:block;animation:bob 15s ease-in-out infinite}
.hero-art figcaption{margin-top:8px;font-size:.83rem;color:#5d4d6a;text-align:center}
@keyframes bob{
  0%,100%{transform:rotate(-2deg) translateY(0)}
  50%{transform:rotate(2.4deg) translateY(-9px)}
}

/* 正文与侧栏 */
.board{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:26px;align-items:start;padding-bottom:14px}
.prose{min-width:0;overflow-wrap:break-word}
.prose > article{
  background:var(--glass);
  -webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;margin:0 0 22px;box-shadow:var(--shadow);
}
.prose > article:nth-of-type(2n){border-radius:30px 14px 26px 16px}
.prose > article:nth-of-type(3n){border-radius:14px 28px 16px 32px}
.prose article[id]{scroll-margin-top:104px}
.prose h2{font-size:1.42rem;margin:.1em 0 .6em;color:var(--ink)}
.prose h3{font-size:1.14rem;margin:1.3em 0 .45em;color:var(--plum)}
.prose h2 span,.prose h3 span,.rail-title span,.foot-title span{
  background-image:linear-gradient(transparent 63%, rgba(93,122,79,.46) 63%);
  padding-bottom:2px;
}
.prose p{margin:0 0 1em}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{margin:0 0 1em}
.prose li{margin:.32em 0}
.prose li::marker{color:var(--clay)}
.prose a{color:var(--plum);text-underline-offset:3px}
.prose strong{color:#2a1e33}
.prose time{font-family:"Space Grotesk",sans-serif;font-size:.85rem;color:#5d4d6a}
.prose figure,.prose aside{
  margin:1em 0;padding:14px 16px;border-radius:var(--radius-s);
  background:rgba(139,69,19,.1);border-left:4px solid var(--clay);
}
.prose blockquote{
  margin:1em 0;padding:12px 16px;border-left:4px solid var(--moss);
  background:rgba(93,122,79,.11);border-radius:12px;
}
.prose table{width:100%;max-width:100%;display:block;overflow-x:auto;border-collapse:collapse;font-size:.94rem;margin:0 0 1em}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:8px;text-align:left}
.prose pre{max-width:100%;overflow-x:auto}

.rail{position:sticky;top:94px;display:grid;gap:18px;min-width:0}
.card{
  background:rgba(255,255,255,.64);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:var(--radius-s);
  padding:16px;box-shadow:var(--shadow);
}
.rail-title{font-size:1rem;margin:0 0 10px;display:flex;gap:6px}
.rail-list{list-style:none;margin:0;padding:0;display:grid;gap:2px;counter-reset:r}
.rail-list li{counter-increment:r}
.rail-list a{
  display:flex;align-items:center;gap:9px;min-height:40px;padding:0 8px;
  border-radius:9px;text-decoration:none;color:var(--ink);font-size:.92rem;
}
.rail-list a::before{
  content:counter(r,decimal-leading-zero);
  font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:.74rem;color:var(--clay);
}
.rail-list a:hover,.rail-list a.on{background:rgba(86,34,139,.11);color:var(--plum)}
.rail p{margin:0;font-size:.9rem;color:#4b3d57}

/* 页脚 */
.foot{margin-top:42px;background:var(--ink);color:#efe7f3;padding:34px 18px 18px}
.foot-inner{max-width:var(--wrap);margin:0 auto;min-width:0}
.foot-cta{
  display:grid;gap:12px;justify-items:start;padding:22px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.17);
  border-radius:28px 16px 32px 18px;
}
.foot-title{margin:0;font-size:1.25rem;color:#fff}
.foot-cta p{margin:0;font-size:.95rem;color:#cbbdd6}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:26px 0 16px}
.foot dl{margin:0;min-width:0}
.foot dt{font-size:.82rem;letter-spacing:.06em;color:#b6a3c4;margin-bottom:4px}
.foot dd{margin:0}
.foot dd a,.foot dd span{
  display:block;min-height:40px;padding:9px 0;font-size:.92rem;
  color:#e5daee;text-decoration:none;
}
.foot dd a:hover{color:#fff;text-decoration:underline}
.foot-copy{margin:0;padding-top:14px;border-top:1px solid rgba(255,255,255,.15);font-size:.82rem;color:#a795b6}

@media (max-width:880px){
  .nav{flex:1 1 100%;order:3}
  .top-inner{padding:8px 14px}
  .main{padding:16px 14px 0}
  .hero{grid-template-columns:1fr;min-height:0;padding-bottom:34px}
  .hero-art svg{max-width:210px}
  .board{grid-template-columns:1fr}
  .rail{position:static}
  .foot-cols{grid-template-columns:1fr;gap:12px}
  .prose > article{padding:20px 16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero-art svg{animation:none}
  .btn{transition:none}
}
@supports not (overflow:clip){
  html,body{overflow-x:hidden}
}

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